HTML5: Always disable Asset Library

GitHub doesn't allow CORS so we can't download assets from it.

There'd also be more work needed for the Asset Library plugin to be
usable in the Web editor even if that was supported.

(cherry picked from commit 42b48496dedf20d7dd43756efac4408e0a9c639f)

editor/editor_node.cpp

@@ -6964,11 +6964,15 @@ EditorNode::EditorNode() {
 	ScriptTextEditor::register_editor(); //register one for text scripts
 	TextEditor::register_editor();
 
+	// 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()) {
 		add_editor_plugin(memnew(AssetLibraryEditorPlugin(this)));
 	} else {
 		WARN_PRINT("Asset Library not available, as it requires SSL to work.");
 	}
+#endif
 
 	//add interface before adding plugins
 

editor/project_manager.cpp

@@ -2593,6 +2593,9 @@ ProjectManager::ProjectManager() {
 	about_btn->connect("pressed", this, "_show_about");
 	tree_vb->add_child(about_btn);
 
+	// 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()) {
 		asset_library = memnew(EditorAssetLibrary(true));
 		asset_library->set_name(TTR("Asset Library Projects"));
@@ -2601,6 +2604,7 @@ ProjectManager::ProjectManager() {
 	} else {
 		WARN_PRINT("Asset Library not available, as it requires SSL to work.");
 	}
+#endif
 
 	HBoxContainer *settings_hb = memnew(HBoxContainer);
 	settings_hb->set_alignment(BoxContainer::ALIGN_END);