Fix snap mode selector sticking in texture region module

When changing snap mode in texture region plugin ticks was not updating. Issue fixed changing order of setting checked status and setting snap mode.

(cherry picked from commit d7667389914e446f81b8c4810a5b1f9a00eabfca)

tools/editor/plugins/texture_region_editor_plugin.cpp

@@ -507,8 +507,8 @@ void TextureRegionEditor::_scroll_changed(float)
 
 void TextureRegionEditor::_set_snap_mode(int p_mode)
 {
-	snap_mode = p_mode;
 	snap_mode_button->get_popup()->set_item_checked(snap_mode,false);
+	snap_mode = p_mode;
 	snap_mode_button->set_text(snap_mode_button->get_popup()->get_item_text(p_mode));
 	snap_mode_button->get_popup()->set_item_checked(snap_mode,true);