Improved some editor checkboxes

(cherry picked from commit 5dc7346ab4d9353c7fa881b0f82a06e7d4fbe938)

editor/editor_node.cpp

@@ -6760,10 +6760,12 @@ EditorNode::EditorNode() {
 	file_export_lib->connect("file_selected", this, "_dialog_action");
 	file_export_lib_merge = memnew(CheckBox);
 	file_export_lib_merge->set_text(TTR("Merge With Existing"));
+	file_export_lib_merge->set_h_size_flags(Control::SIZE_SHRINK_CENTER);
 	file_export_lib_merge->set_pressed(true);
 	file_export_lib->get_vbox()->add_child(file_export_lib_merge);
 	file_export_lib_apply_xforms = memnew(CheckBox);
 	file_export_lib_apply_xforms->set_text(TTR("Apply MeshInstance Transforms"));
+	file_export_lib_apply_xforms->set_h_size_flags(Control::SIZE_SHRINK_CENTER);
 	file_export_lib_apply_xforms->set_pressed(false);
 	file_export_lib->get_vbox()->add_child(file_export_lib_apply_xforms);
 	gui_base->add_child(file_export_lib);

editor/project_export.cpp

@@ -1174,11 +1174,13 @@ ProjectExportDialog::ProjectExportDialog() {
 	export_debug = memnew(CheckBox);
 	export_debug->set_text(TTR("Export With Debug"));
 	export_debug->set_pressed(true);
+	export_debug->set_h_size_flags(Control::SIZE_SHRINK_CENTER);
 	export_project->get_vbox()->add_child(export_debug);
 
 	export_pck_zip_debug = memnew(CheckBox);
 	export_pck_zip_debug->set_text(TTR("Export With Debug"));
 	export_pck_zip_debug->set_pressed(true);
+	export_pck_zip_debug->set_h_size_flags(Control::SIZE_SHRINK_CENTER);
 	export_pck_zip->get_vbox()->add_child(export_pck_zip_debug);
 
 	set_hide_on_ok(false);