Add placeholders to the searchbars in the Project/Editor settings

editor/project_settings_editor.cpp

@@ -333,6 +333,7 @@ ProjectSettingsEditor::ProjectSettingsEditor(EditorData *p_data) {
 		header->add_child(search_bar);
 
 		search_box = memnew(LineEdit);
+		search_box->set_placeholder(TTR("Search"));
 		search_box->set_h_size_flags(Control::SIZE_EXPAND_FILL);
 		search_bar->add_child(search_box);
 

editor/settings_config_dialog.cpp

@@ -405,6 +405,7 @@ EditorSettingsDialog::EditorSettingsDialog() {
 	tab_general->add_child(hbc);
 
 	search_box = memnew(LineEdit);
+	search_box->set_placeholder(TTR("Search"));
 	search_box->set_h_size_flags(Control::SIZE_EXPAND_FILL);
 	hbc->add_child(search_box);
 
@@ -449,6 +450,7 @@ EditorSettingsDialog::EditorSettingsDialog() {
 	tab_shortcuts->add_child(hbc);
 
 	shortcut_search_box = memnew(LineEdit);
+	shortcut_search_box->set_placeholder(TTR("Search"));
 	shortcut_search_box->set_h_size_flags(Control::SIZE_EXPAND_FILL);
 	hbc->add_child(shortcut_search_box);
 	shortcut_search_box->connect("text_changed", callable_mp(this, &EditorSettingsDialog::_filter_shortcuts));