Fix merging errors for panel_size_scale_value_changed_cb (home-sweet-…

…gnome#1328)

* fix panel_size_scale_value_changed_cb

* fix panel_size_scale_value_changed_cb home-sweet-gnome#2

prefs.js

@@ -2303,13 +2303,19 @@ const BuilderScope = GObject.registerClass({
     }
 
     panel_size_scale_value_changed_cb(scale) {
-        // Avoid settings the size consinuosly
+        // Avoid settings the size continuously
         if (this._preferences._panel_size_timeout > 0)
-            Mainloop.source_remove(this._preferences._panel_size_timeout);
+        Mainloop.source_remove(this._preferences._panel_size_timeout);
+
+        this._preferences._panel_size_timeout = Mainloop.timeout_add(SCALE_UPDATE_TIMEOUT, Lang.bind(this._preferences, function() {
+            const value = scale.get_value();
+            const monitorSync = this._settings.get_boolean('panel-element-positions-monitors-sync');
+            const monitorsToSetFor = monitorSync ? this.monitors : [this._currentMonitorIndex];
+            monitorsToSetFor.forEach(monitorIndex => {
+                PanelSettings.setPanelSize(this._settings, monitorIndex, value);
+            });
 
-        this._preferences._panel_size_timeout = Mainloop.timeout_add(SCALE_UPDATE_TIMEOUT, Lang.bind(this, function() {
-            this._preferences._settings.set_int('panel-size', scale.get_value());
-            this._preferences._panel_size_timeout = 0;
+            this._panel_size_timeout = 0;
             return GLib.SOURCE_REMOVE;
         }));
     }