fixed blank disabled Select element option (affected workspaces menu)

Signed-off-by: Jim Ehrismann <jehrismann@mirantis.com>

src/renderer/components/select/select.scss

@@ -106,7 +106,7 @@ html {
       &--is-disabled {
         cursor: not-allowed;
         background: none !important;
-        color: $contentColor;
+        color: inherit;
         opacity: .75;
       }
 
@@ -166,6 +166,10 @@ html {
           &--is-focused {
             color: white;
           }
+
+          &--is-disabled:hover {
+            color: inherit;
+          }
         }
       }
     }