[AssetLib] Fix crash in Web editor.

Add EditorAssetLibrary::is_available which always returns false in the
Web editor and use it in EditorNode for detection.

editor/editor_node.cpp

@@ -460,7 +460,7 @@ void EditorNode::shortcut_input(const Ref<InputEvent> &p_event) {
 			_editor_select(EDITOR_SCRIPT);
 		} else if (ED_IS_SHORTCUT("editor/editor_help", p_event)) {
 			emit_signal(SNAME("request_help_search"), "");
-		} else if (ED_IS_SHORTCUT("editor/editor_assetlib", p_event) && StreamPeerSSL::is_available()) {
+		} else if (ED_IS_SHORTCUT("editor/editor_assetlib", p_event) && AssetLibraryEditorPlugin::is_available()) {
 			_editor_select(EDITOR_ASSETLIB);
 		} else if (ED_IS_SHORTCUT("editor/editor_next", p_event)) {
 			_editor_select_next();
@@ -5752,12 +5752,12 @@ void EditorNode::_feature_profile_changed() {
 
 		main_editor_buttons[EDITOR_3D]->set_visible(!profile->is_feature_disabled(EditorFeatureProfile::FEATURE_3D));
 		main_editor_buttons[EDITOR_SCRIPT]->set_visible(!profile->is_feature_disabled(EditorFeatureProfile::FEATURE_SCRIPT));
-		if (StreamPeerSSL::is_available()) {
+		if (AssetLibraryEditorPlugin::is_available()) {
 			main_editor_buttons[EDITOR_ASSETLIB]->set_visible(!profile->is_feature_disabled(EditorFeatureProfile::FEATURE_ASSET_LIB));
 		}
 		if ((profile->is_feature_disabled(EditorFeatureProfile::FEATURE_3D) && singleton->main_editor_buttons[EDITOR_3D]->is_pressed()) ||
 				(profile->is_feature_disabled(EditorFeatureProfile::FEATURE_SCRIPT) && singleton->main_editor_buttons[EDITOR_SCRIPT]->is_pressed()) ||
-				(StreamPeerSSL::is_available() && profile->is_feature_disabled(EditorFeatureProfile::FEATURE_ASSET_LIB) && singleton->main_editor_buttons[EDITOR_ASSETLIB]->is_pressed())) {
+				(AssetLibraryEditorPlugin::is_available() && profile->is_feature_disabled(EditorFeatureProfile::FEATURE_ASSET_LIB) && singleton->main_editor_buttons[EDITOR_ASSETLIB]->is_pressed())) {
 			_editor_select(EDITOR_2D);
 		}
 	} else {
@@ -5769,7 +5769,7 @@ void EditorNode::_feature_profile_changed() {
 		FileSystemDock::get_singleton()->set_visible(true);
 		main_editor_buttons[EDITOR_3D]->set_visible(true);
 		main_editor_buttons[EDITOR_SCRIPT]->set_visible(true);
-		if (StreamPeerSSL::is_available()) {
+		if (AssetLibraryEditorPlugin::is_available()) {
 			main_editor_buttons[EDITOR_ASSETLIB]->set_visible(true);
 		}
 	}
@@ -7073,13 +7073,11 @@ EditorNode::EditorNode() {
 
 	// Asset Library can't work on Web editor for now as most assets are sourced
 	// directly from GitHub which does not set CORS.
-#ifndef JAVASCRIPT_ENABLED
-	if (StreamPeerSSL::is_available()) {
+	if (AssetLibraryEditorPlugin::is_available()) {
 		add_editor_plugin(memnew(AssetLibraryEditorPlugin));
 	} else {
 		WARN_PRINT("Asset Library not available, as it requires SSL to work.");
 	}
-#endif
 
 	// Add interface before adding plugins.
 

editor/plugins/asset_library_editor_plugin.cpp

@@ -32,6 +32,7 @@
 
 #include "core/input/input.h"
 #include "core/io/json.h"
+#include "core/io/stream_peer_ssl.h"
 #include "core/os/keyboard.h"
 #include "core/version.h"
 #include "editor/editor_file_dialog.h"
@@ -1588,6 +1589,16 @@ EditorAssetLibrary::EditorAssetLibrary(bool p_templates_only) {
 
 ///////
 
+bool AssetLibraryEditorPlugin::is_available() {
+#ifdef JAVASCRIPT_ENABLED
+	// Asset Library can't work on Web editor for now as most assets are sourced
+	// directly from GitHub which does not set CORS.
+	return false;
+#else
+	return StreamPeerSSL::is_available();
+#endif
+}
+
 void AssetLibraryEditorPlugin::make_visible(bool p_visible) {
 	if (p_visible) {
 		addon_library->show();

editor/plugins/asset_library_editor_plugin.h

@@ -322,6 +322,8 @@ class AssetLibraryEditorPlugin : public EditorPlugin {
 	EditorAssetLibrary *addon_library = nullptr;
 
 public:
+	static bool is_available();
+
 	virtual String get_name() const override { return "AssetLib"; }
 	bool has_main_screen() const override { return true; }
 	virtual void edit(Object *p_object) override {}

editor/project_manager.cpp

@@ -2792,10 +2792,7 @@ ProjectManager::ProjectManager() {
 		center_box->add_child(settings_hb);
 	}
 
-	// Asset Library can't work on Web editor for now as most assets are sourced
-	// directly from GitHub which does not set CORS.
-#ifndef JAVASCRIPT_ENABLED
-	if (StreamPeerSSL::is_available()) {
+	if (AssetLibraryEditorPlugin::is_available()) {
 		asset_library = memnew(EditorAssetLibrary(true));
 		asset_library->set_name(TTR("Asset Library Projects"));
 		tabs->add_child(asset_library);
@@ -2803,7 +2800,6 @@ ProjectManager::ProjectManager() {
 	} else {
 		WARN_PRINT("Asset Library not available, as it requires SSL to work.");
 	}
-#endif
 
 	{
 		// Dialogs