Bug 1316296 - Remove gap at the bottom of font-inspector. r=jdescottes

--HG--
extra : rebase_source : cb2a97bbeeb0070a835118d2214d97784ef5e03b

devtools/client/themes/fonts.css

@@ -6,7 +6,6 @@
   margin: 0;
   display: flex;
   flex-direction: column;
-  padding-bottom: 20px;
   width: 100%;
   height: 100%;
 }