Fix text color on light theme (#362)

* Apply color on widget title

* Update dnd.scss

* Update style.scss

data/style/style.scss

@@ -286,6 +286,7 @@ $notification-shadow: 0 0 0 1px rgba(0, 0, 0, 0.3),
 .control-center {
   /* The Control Center which contains the old notifications + widgets */
   background: #{"@cc-bg"};
+  color: #{"@text-color"};
   border-radius: $border-radius;
 
   .control-center-list-placeholder {

data/style/widgets/dnd.scss

@@ -1,4 +1,5 @@
 .widget-dnd {
+  color: #{"@text-color"};
   margin: 8px;
   font-size: 1.1rem;
 }

data/style/widgets/title.scss

@@ -1,4 +1,5 @@
 .widget-title {
+  color: #{"@text-color"};
   margin: 8px;
   font-size: 1.5rem;
 }