fix(styles): add hover state to primary buttons (#5157) r=vladikoff

app/styles/modules/_button-row.scss

@@ -44,11 +44,6 @@
       padding: 8px 0;
     }
 
-    &:hover {
-      background: $button-background-hover-color;
-      border-color: $button-border-hover-color;
-    }
-
     &:active {
       background: $button-background-active-color;
       border-color: $button-border-active-color;

app/styles/modules/_settings.scss

@@ -214,6 +214,11 @@ body.settings #main-content.card {
     border: solid 1px $button-border-default-color;
     color: $message-text-color;
 
+    &:hover {
+      background: $button-background-hover-color;
+      border-color: $button-border-hover-color;
+    }
+
     &:disabled,
     &.disabled {
       background: $button-background-default-color;