Adding configuration options to change spacing between icons and labels inside the buttons in the bar. (#30)

* Branch protection check.

* Move button spacing config into the Configuration section instead of Theming.

* Partially Resolves #26 - Added the ability to configure outer spacing on the bar.

* Renamed all class names for buttons so they can be styled with margins.

* Added configurable spacing to buttons.

* Fixed styling for network module when using wifi.

* Fixed ghost margins that occur when labels are disabled in the bar buttons.

* Change the default page of the settings dialog to configuration.

scss/style/bar/bluetooth.scss

@@ -1,13 +1,14 @@
 @import '../colors';
 @import '../../variables';
 
-.bar-bt_icon {
+.bar-button-icon.bluetooth {
   font-size: 1.15em;
   color: if($bar-buttons-monochrome, $bar-buttons-icon, $bar-buttons-bluetooth-icon);
 }
 
-.bar-bt_label {
+.bar-button-label.bluetooth {
   color: if($bar-buttons-monochrome, $bar-buttons-text, $bar-buttons-bluetooth-text);
+  margin-left: $bar-buttons-bluetooth-spacing;
 }
 
 .bluetooth-disabled-menu {