panel : mixer : fix popup opening when doing mute_action

Instead of activating the control’s button, which was opening the widget popup,
manually set the state and prevent poping up.

Fixes #488

Co-authored by froloffw7

Author: AKArien

src/panel/widgets/mixer/mixer.cpp

@@ -98,7 +98,15 @@ void WayfireMixer::reload_config()
             return; // no quick_target means we have nothing to change by clicking
         }
 
-        quick_target->button.set_active(!quick_target->button.get_active());
+        guint32 id = wp_proxy_get_bound_id(WP_PROXY(quick_target->object));
+        bool mute  = !quick_target->button.get_active();
+
+        // pretend the mixer control is the source of the change to prevent a popup
+        objects_to_controls[quick_target->object]->ignore = true;
+        // still set visual state
+        objects_to_controls[quick_target->object]->set_btn_status_no_callbk(mute);
+        quick_target->set_btn_status_no_callbk(mute);
+        WpCommon::get().set_mute(id, mute);
     };
 
     if (str_wp_left_click_action.value() == "show_mixer")