Modals to edit pane work almost done, need to work on light theme

src/css/less/bootswatch.dark.less

@@ -549,12 +549,12 @@ a:hover {
 }
 
 .modal-header {
-	border-bottom: 1px solid @grayDark;
+	border-bottom: 1px solid @grafanaPanelBackground;
 }
 
 .modal-footer {
 	background-color: @grafanaPanelBackground;
-	border-top: 1px solid @grayDark;
+	border-top: 1px solid @grafanaPanelBackground;
 	.border-radius(0 0 0px 0px);
 	.box-shadow(none);
 }

src/css/less/submenu.less

@@ -1,6 +1,6 @@
 .submenu-controls-visible:not(.hide-controls) {
   .panel-fullscreen {
-    top: 90px;
+    top: 91px;
   }
 }