Do not disable the default button when it's set.

I reworked the way this was done so we can easily re-enable this as I think it's clearer when it's inactive
(the difference between toggled and not toggled is pretty minor).

With this abstraction we could reset the tooltip etc. too.

src/devicewidget.cc

@@ -95,9 +95,11 @@ void DeviceWidget::onMuteToggleButton() {
 }
 
 void DeviceWidget::onDefaultToggleButton() {
-    /* Prevent the button being untoggled */
-    if (defaultToggleButton->get_active())
-        defaultToggleButton->set_sensitive(false);
+}
+
+void DeviceWidget::setDefault(bool isDefault) {
+    defaultToggleButton->set_active(isDefault);
+    /*defaultToggleButton->set_sensitive(!isDefault);*/
 }
 
 bool DeviceWidget::timeoutEvent() {

src/devicewidget.h

@@ -44,6 +44,7 @@ public:
 
     virtual void onMuteToggleButton();
     virtual void onDefaultToggleButton();
+    virtual void setDefault(bool isDefault);
 
     sigc::connection timeoutConnection;
 

src/mainwindow.cc

@@ -214,8 +214,7 @@ void MainWindow::updateSink(const pa_sink_info &info) {
     w->setVolume(info.volume);
     w->muteToggleButton->set_active(info.mute);
 
-    w->defaultToggleButton->set_active(w->name == defaultSinkName);
-    w->defaultToggleButton->set_sensitive(w->name != defaultSinkName);
+    w->setDefault(w->name == defaultSinkName);
 
     w->updating = false;
 
@@ -363,8 +362,7 @@ void MainWindow::updateSource(const pa_source_info &info) {
     w->setVolume(info.volume);
     w->muteToggleButton->set_active(info.mute);
 
-    w->defaultToggleButton->set_active(w->name == defaultSourceName);
-    w->defaultToggleButton->set_sensitive(w->name != defaultSourceName);
+    w->setDefault(w->name == defaultSourceName);
 
     w->updating = false;
 
@@ -533,8 +531,7 @@ void MainWindow::updateServer(const pa_server_info &info) {
             continue;
 
         w->updating = true;
-        w->defaultToggleButton->set_active(w->name == defaultSinkName);
-        w->defaultToggleButton->set_sensitive(w->name != defaultSinkName);
+        w->setDefault(w->name == defaultSinkName);
 
         w->updating = false;
     }
@@ -546,8 +543,7 @@ void MainWindow::updateServer(const pa_server_info &info) {
             continue;
 
         w->updating = true;
-        w->defaultToggleButton->set_active(w->name == defaultSourceName);
-        w->defaultToggleButton->set_sensitive(w->name != defaultSourceName);
+        w->setDefault(w->name == defaultSourceName);
         w->updating = false;
     }
 }

src/sinkwidget.cc

@@ -66,8 +66,6 @@ void SinkWidget::onMuteToggleButton() {
 void SinkWidget::onDefaultToggleButton() {
     pa_operation* o;
 
-    DeviceWidget::onDefaultToggleButton();
-
     if (updating)
         return;
 

src/sourcewidget.cc

@@ -66,8 +66,6 @@ void SourceWidget::onMuteToggleButton() {
 void SourceWidget::onDefaultToggleButton() {
     pa_operation* o;
 
-    DeviceWidget::onDefaultToggleButton();
-
     if (updating)
         return;