Fixed tool headings

files/styles/style-dark.css

 * {
     background-color: #222;
     color: #FFF;
-    background-clip: border;
     font-size: 11px;
 }
 
@@ -68,9 +67,7 @@ QDockWidget {
 }
 
 QDockWidget::close-button, QDockWidget::float-button {
-    border: 1px solid transparent;
     background: none;
-    padding: 0;
 }
 
 QDockWidget::close-button:hover, QDockWidget::float-button:hover {
@@ -86,8 +83,8 @@ QDockWidget::title {
     text-align: left;
     background-color: qlineargradient(x1: 0, y1: 0, x2: 0, y2: 1, stop: 0 #3F556A, stop: 1 #293645);
     color: #EDEDED;
-    padding-left: 3px;
     height: 14px;
+    padding-left: 2.5em;
 }
 
 QGCMAVLinkLogPlayer {