Bug 1404246 - Fix disabled scroll buttons in the tabs toolbar on Windows properly. r=dao

MozReview-Commit-ID: AjBDcRXjoFt

--HG--
extra : rebase_source : 0e29d3d4f74daf383c72dd96ea828092457dcf2c

browser/themes/shared/tabs.inc.css

@@ -601,6 +601,7 @@ tabbrowser {
   -moz-context-properties: fill, fill-opacity;
   fill: currentColor;
   fill-opacity: var(--toolbarbutton-icon-fill-opacity);
+  color: inherit;
 }
 
 .tabbrowser-arrowscrollbox > .scrollbutton-up:-moz-locale-dir(rtl),

browser/themes/windows/browser.css

@@ -115,8 +115,7 @@
       --tabs-border: #4A4A4F;
     }
 
-    #TabsToolbar:not(:-moz-lwtheme),
-    #TabsToolbar:not(:-moz-lwtheme) toolbarbutton[disabled="true"] {
+    #TabsToolbar:not(:-moz-lwtheme) {
       color: hsl(240,9%,98%);
     }
 

browser/themes/windows/compacttheme.css

@@ -27,8 +27,7 @@
 @media (-moz-os-version: windows-win7) {
   @media (-moz-windows-default-theme) {
     /* Always show light toolbar elements on aero surface. */
-    #TabsToolbar,
-    #TabsToolbar toolbarbutton[disabled="true"] {
+    #TabsToolbar {
       color: hsl(240,9%,98%);
     }