add line spacing option to script and shader editor (#5105)

tools/editor/plugins/script_editor_plugin.cpp

@@ -302,6 +302,7 @@ void ScriptTextEditor::_load_theme_settings() {
 	get_text_edit()->add_color_override("breakpoint_color", EDITOR_DEF("text_editor/breakpoint_color", Color(0.8,0.8,0.4,0.2)));
 	get_text_edit()->add_color_override("search_result_color",EDITOR_DEF("text_editor/search_result_color",Color(0.05,0.25,0.05,1)));
 	get_text_edit()->add_color_override("search_result_border_color",EDITOR_DEF("text_editor/search_result_border_color",Color(0.1,0.45,0.1,1)));
+	get_text_edit()->add_constant_override("line_spacing", EDITOR_DEF("text_editor/line_spacing",4));
 
 	Color keyword_color= EDITOR_DEF("text_editor/keyword_color",Color(0.5,0.0,0.2));
 

tools/editor/plugins/shader_editor_plugin.cpp

@@ -375,6 +375,7 @@ void ShaderEditor::_editor_settings_changed() {
 		vertex_editor->get_text_edit()->set_highlight_all_occurrences(EditorSettings::get_singleton()->get("text_editor/highlight_all_occurrences"));
 		vertex_editor->get_text_edit()->cursor_set_blink_enabled(EditorSettings::get_singleton()->get("text_editor/caret_blink"));
 		vertex_editor->get_text_edit()->cursor_set_blink_speed(EditorSettings::get_singleton()->get("text_editor/caret_blink_speed"));
+		vertex_editor->get_text_edit()->add_constant_override("line_spacing", EditorSettings::get_singleton()->get("text_editor/line_spacing"));
 
 		fragment_editor->get_text_edit()->set_auto_brace_completion(EditorSettings::get_singleton()->get("text_editor/auto_brace_complete"));
 		fragment_editor->get_text_edit()->set_scroll_pass_end_of_file(EditorSettings::get_singleton()->get("text_editor/scroll_past_end_of_file"));
@@ -385,6 +386,7 @@ void ShaderEditor::_editor_settings_changed() {
 		fragment_editor->get_text_edit()->set_highlight_all_occurrences(EditorSettings::get_singleton()->get("text_editor/highlight_all_occurrences"));
 		fragment_editor->get_text_edit()->cursor_set_blink_enabled(EditorSettings::get_singleton()->get("text_editor/caret_blink"));
 		fragment_editor->get_text_edit()->cursor_set_blink_speed(EditorSettings::get_singleton()->get("text_editor/caret_blink_speed"));
+		fragment_editor->get_text_edit()->add_constant_override("line_spacing", EditorSettings::get_singleton()->get("text_editor/line_spacing"));
 
 		light_editor->get_text_edit()->set_auto_brace_completion(EditorSettings::get_singleton()->get("text_editor/auto_brace_complete"));
 		light_editor->get_text_edit()->set_scroll_pass_end_of_file(EditorSettings::get_singleton()->get("text_editor/scroll_past_end_of_file"));
@@ -395,6 +397,7 @@ void ShaderEditor::_editor_settings_changed() {
 		light_editor->get_text_edit()->set_highlight_all_occurrences(EditorSettings::get_singleton()->get("text_editor/highlight_all_occurrences"));
 		light_editor->get_text_edit()->cursor_set_blink_enabled(EditorSettings::get_singleton()->get("text_editor/caret_blink"));
 		light_editor->get_text_edit()->cursor_set_blink_speed(EditorSettings::get_singleton()->get("text_editor/caret_blink_speed"));
+		light_editor->get_text_edit()->add_constant_override("line_spacing", EditorSettings::get_singleton()->get("text_editor/line_spacing"));
 }
 
 void ShaderEditor::_bind_methods() {