Disabled color: lightgray -> gray

src/panel/graph_panel/partials/analytic_units_5.x.html

@@ -90,10 +90,11 @@
     <label class="gf-form-label"
       ng-style="!analyticUnit.changed && { 'cursor': 'not-allowed' }"
     >
+      <!-- TODO: different disabled colors for light and dark themes -->
       <a class="pointer"
         ng-click="ctrl.onAnalyticUnitSave(analyticUnit)"
         ng-disabled="!analyticUnit.changed"
-        ng-style="!analyticUnit.changed && { 'color': 'lightgray' }"
+        ng-style="!analyticUnit.changed && { 'color': 'gray' }"
         role="menuitem"
       >
         <i class="fa fa-spinner fa-spin" ng-if="analyticUnit.saving"></i>

src/panel/graph_panel/partials/analytic_units_6.x.html

@@ -81,7 +81,7 @@
       >
         <a class="pointer"
           ng-style="!analyticUnit.changed && {
-            'color': 'lightgray',
+            'color': 'gray',
             'cursor': 'not-allowed'
           }"
         >