Hide non-functional "Show in File Manager" buttons in Android/web editor

The editor filesystem isn't readily accessible by OS applications
on those platforms.

editor/editor_file_dialog.cpp

@@ -620,12 +620,16 @@ void EditorFileDialog::_item_list_item_rmb_clicked(int p_item, const Vector2 &p_
 	if (allow_delete) {
 		item_menu->add_icon_item(theme_cache.action_delete, TTR("Delete"), ITEM_MENU_DELETE, Key::KEY_DELETE);
 	}
+
+#if !defined(ANDROID_ENABLED) && !defined(WEB_ENABLED)
+	// Opening the system file manager is not supported on the Android and web editors.
 	if (single_item_selected) {
 		item_menu->add_separator();
 		Dictionary item_meta = item_list->get_item_metadata(p_item);
 		String item_text = item_meta["dir"] ? TTR("Open in File Manager") : TTR("Show in File Manager");
 		item_menu->add_icon_item(theme_cache.filesystem, item_text, ITEM_MENU_SHOW_IN_EXPLORER);
 	}
+#endif
 
 	if (item_menu->get_item_count() > 0) {
 		item_menu->set_position(item_list->get_screen_position() + p_pos);
@@ -655,8 +659,11 @@ void EditorFileDialog::_item_list_empty_clicked(const Vector2 &p_pos, MouseButto
 		item_menu->add_icon_item(theme_cache.folder, TTR("New Folder..."), ITEM_MENU_NEW_FOLDER, KeyModifierMask::CMD_OR_CTRL | Key::N);
 	}
 	item_menu->add_icon_item(theme_cache.reload, TTR("Refresh"), ITEM_MENU_REFRESH, Key::F5);
+#if !defined(ANDROID_ENABLED) && !defined(WEB_ENABLED)
+	// Opening the system file manager is not supported on the Android and web editors.
 	item_menu->add_separator();
 	item_menu->add_icon_item(theme_cache.filesystem, TTR("Open in File Manager"), ITEM_MENU_SHOW_IN_EXPLORER);
+#endif
 
 	item_menu->set_position(item_list->get_screen_position() + p_pos);
 	item_menu->reset_size();

editor/filesystem_dock.cpp

@@ -2643,17 +2643,24 @@ void FileSystemDock::_file_and_folders_fill_popup(PopupMenu *p_popup, Vector<Str
 			new_menu->add_icon_item(get_theme_icon(SNAME("Script"), SNAME("EditorIcons")), TTR("Script..."), FILE_NEW_SCRIPT);
 			new_menu->add_icon_item(get_theme_icon(SNAME("Object"), SNAME("EditorIcons")), TTR("Resource..."), FILE_NEW_RESOURCE);
 			new_menu->add_icon_item(get_theme_icon(SNAME("TextFile"), SNAME("EditorIcons")), TTR("TextFile..."), FILE_NEW_TEXTFILE);
+#if !defined(ANDROID_ENABLED) && !defined(WEB_ENABLED)
 			p_popup->add_separator();
+#endif
 		}
 
-		String fpath = p_paths[0];
-		bool is_directory = fpath.ends_with("/");
-		String item_text = is_directory ? TTR("Open in File Manager") : TTR("Show in File Manager");
+		const String fpath = p_paths[0];
+
+#if !defined(ANDROID_ENABLED) && !defined(WEB_ENABLED)
+		// Opening the system file manager is not supported on the Android and web editors.
+		const bool is_directory = fpath.ends_with("/");
+		const String item_text = is_directory ? TTR("Open in File Manager") : TTR("Show in File Manager");
 		p_popup->add_icon_shortcut(get_theme_icon(SNAME("Filesystem"), SNAME("EditorIcons")), ED_GET_SHORTCUT("filesystem_dock/show_in_explorer"), FILE_SHOW_IN_EXPLORER);
 		p_popup->set_item_text(p_popup->get_item_index(FILE_SHOW_IN_EXPLORER), item_text);
 		if (!is_directory) {
 			p_popup->add_icon_shortcut(get_theme_icon(SNAME("ExternalLink"), SNAME("EditorIcons")), ED_GET_SHORTCUT("filesystem_dock/open_in_external_program"), FILE_OPEN_EXTERNAL);
 		}
+#endif
+
 		path = fpath;
 	}
 }
@@ -2697,8 +2704,11 @@ void FileSystemDock::_tree_empty_click(const Vector2 &p_pos, MouseButton p_butto
 	tree_popup->add_icon_item(get_theme_icon(SNAME("Script"), SNAME("EditorIcons")), TTR("New Script..."), FILE_NEW_SCRIPT);
 	tree_popup->add_icon_item(get_theme_icon(SNAME("Object"), SNAME("EditorIcons")), TTR("New Resource..."), FILE_NEW_RESOURCE);
 	tree_popup->add_icon_item(get_theme_icon(SNAME("TextFile"), SNAME("EditorIcons")), TTR("New TextFile..."), FILE_NEW_TEXTFILE);
+#if !defined(ANDROID_ENABLED) && !defined(WEB_ENABLED)
+	// Opening the system file manager is not supported on the Android and web editors.
 	tree_popup->add_separator();
 	tree_popup->add_icon_shortcut(get_theme_icon(SNAME("Filesystem"), SNAME("EditorIcons")), ED_GET_SHORTCUT("filesystem_dock/show_in_explorer"), FILE_SHOW_IN_EXPLORER);
+#endif
 
 	tree_popup->set_position(tree->get_screen_position() + p_pos);
 	tree_popup->reset_size();
@@ -3120,8 +3130,11 @@ FileSystemDock::FileSystemDock() {
 	ED_SHORTCUT("filesystem_dock/delete", TTR("Delete"), Key::KEY_DELETE);
 	ED_SHORTCUT("filesystem_dock/rename", TTR("Rename..."), Key::F2);
 	ED_SHORTCUT_OVERRIDE("filesystem_dock/rename", "macos", Key::ENTER);
+#if !defined(ANDROID_ENABLED) && !defined(WEB_ENABLED)
+	// Opening the system file manager or opening in an external program is not supported on the Android and web editors.
 	ED_SHORTCUT("filesystem_dock/show_in_explorer", TTR("Open in File Manager"));
 	ED_SHORTCUT("filesystem_dock/open_in_external_program", TTR("Open in External Program"));
+#endif
 
 	VBoxContainer *top_vbc = memnew(VBoxContainer);
 	add_child(top_vbc);

editor/project_manager.cpp

@@ -1503,8 +1503,13 @@ void ProjectList::create_project_item_control(int p_index) {
 		path_hb->add_child(show);
 
 		if (!item.missing) {
+#if !defined(ANDROID_ENABLED) && !defined(WEB_ENABLED)
 			show->connect("pressed", callable_mp(this, &ProjectList::_show_project).bind(item.path));
 			show->set_tooltip_text(TTR("Show in File Manager"));
+#else
+			// Opening the system file manager is not supported on the Android and web editors.
+			show->hide();
+#endif
 		} else {
 			show->set_tooltip_text(TTR("Error: Project is missing on the filesystem."));
 		}