GTK3: fix the background of hovered buttons inside infobars

src/themes/Kali/sass/gtk-sass/_common-tweaks.scss

@@ -31,9 +31,14 @@ button {
     border-color: transparent;
     transition: $button_transition;
 
-    &:hover:not(:backdrop):not(:link):not(:visited) {
+    &:hover:not(:backdrop) {
       @extend %button_active;
       transition: none;
+
+      &:link {
+        background: transparent;
+        box-shadow: none;
+      }
     }
   }
 }
@@ -311,7 +316,6 @@ infobar {
   @mixin _infobar_button($bg) {
     button,
     button.flat {
-      // FIXME: extend selection mode buttons
       @include button(normal, $bg, $selected_fg_color, none);
 
       &:hover { @include button(hover, $bg, $selected_fg_color, none); }
@@ -319,7 +323,7 @@ infobar {
       &:active,
       &:checked { @include button(active, $bg, $selected_fg_color, none); }
 
-      &:disabled { @include button(insensitive,$bg,$selected_fg_color,none); }
+      &:disabled { @include button(insensitive, $bg, $selected_fg_color, none); }
 
       &:backdrop {
         @include button(backdrop, $bg, $selected_fg_color, none);