Bug 1358956 - Remove the first separator from the status bar. r=Honza

MozReview-Commit-ID: JyxmI475sog

--HG--
extra : rebase_source : a8688d0a0ddce7148dda18c5ce699f6a3fbd57ee

devtools/client/netmonitor/src/assets/styles/netmonitor.css

@@ -119,7 +119,7 @@ body,
   white-space: nowrap;
 }
 
-.status-bar-label::before {
+.status-bar-label:not(:first-of-type)::before {
   content: "";
   display: inline-block;
   margin-inline-end: 10px;