Minor layout fixes

Signed-off-by: Alex Andreev <alex.andreev.email@gmail.com>

src/renderer/components/app.scss

@@ -141,10 +141,6 @@ a {
     text-decoration: underline;
   }
 
-  &:focus {
-    color: white;
-  }
-
   &:not([href]) {
     border-bottom: 1px dotted;
     text-decoration: none;

src/renderer/components/cluster-manager/clusters-menu.scss

@@ -49,7 +49,7 @@
       border-radius: $radius;
       padding: $padding / 3;
       color: $addClusterIconColor;
-      background: #ffffff55;
+      background: #ffffff66;
       cursor: pointer;
 
       &.active {

src/renderer/components/dock/dock.scss

@@ -77,4 +77,8 @@
       pointer-events: none;
     }
   }
+
+  .AceEditor {
+    border: none;
+  }
 }

src/renderer/components/layout/main-layout.scss

@@ -64,6 +64,7 @@
 
     .theme-light & {
       @include custom-scrollbar(dark);
+      overflow-y: scroll;
     }
 
     grid-area: main;

src/renderer/components/layout/wizard-layout.scss

@@ -19,8 +19,8 @@
 
   > .head-col {
     position: sticky;
-    border-bottom: 1px solid $borderFaintColor;
     justify-content: space-between;
+    background-color: $clusterMenuBackground;
   }
 
   > .content-col {