Bug 1334956 - devtools/client/framework/options-panel.css uses float: inline-start r=jryans

MozReview-Commit-ID: JQMxAoKRpEm

--HG--
extra : rebase_source : 645eab3953bdbdceff2818552c1e59a414abf832

devtools/client/framework/options-panel.css

@@ -15,7 +15,11 @@
 
 .options-vertical-pane {
   display: inline;
-  float: inline-start;
+  float: left;
+}
+
+.options-vertical-pane:dir(rtl) {
+  float: right;
 }
 
 .options-vertical-pane {