Fixed login issue

res/css/login.css

@@ -142,10 +142,10 @@ input[type="submit"] {
   -ms-user-select: none;
   -o-user-select: none;
   user-select: none;
-  background-size: 0;
   min-width: 88px;
   transition: background-size 500ms cubic-bezier(0.98, 0.005, 0.79, 1.005), background-color 500ms cubic-bezier(0.98, 0.005, 0.79, 1.005), color 500ms cubic-bezier(0.98, 0.005, 0.79, 1.005), box-shadow 300ms;
   background: #0a70c0 radial-gradient(circle, #105a94 10%, transparent 10.001%, transparent) no-repeat center center;
+  background-size: 0;
   box-shadow: 0 2px 2px 0 rgba(0, 0, 0, 0.14), 0 3px 1px -2px rgba(0, 0, 0, 0.12), 0 1px 5px 0 rgba(0, 0, 0, 0.2);
   color: #fff;
   width: 100%;

res/css/login.sass

@@ -99,10 +99,10 @@ input[type="submit"]
   line-height: 20px
   font-size: 14px
   @include vendor-prefix('user-select', 'none')
-  background-size: 0
   min-width: 88px
   transition: background-size 500ms cubic-bezier(0.98, 0.005, 0.79, 1.005), background-color 500ms cubic-bezier(0.98, 0.005, 0.79, 1.005), color 500ms cubic-bezier(0.98, 0.005, 0.79, 1.005), box-shadow 300ms
   background: #0a70c0 radial-gradient(circle, #105a94 10%, rgba(0, 0, 0, 0) 10.001%, rgba(0, 0, 0, 0)) no-repeat center center
+  background-size: 0
   box-shadow: 0 2px 2px 0 rgba(0, 0, 0, 0.14), 0 3px 1px -2px rgba(0, 0, 0, 0.12), 0 1px 5px 0 rgba(0, 0, 0, 0.2)
   color: #fff
   width: 100%