Issue #1055. Include bmp and gif in the "remove image upload" regex.

webcompat/static/js/lib/bugform.js

@@ -334,7 +334,7 @@ function BugForm() {
       // Note: this could fail in weird ways depending on how
       // the user has edited the descField.
       this.descField.val(function(idx, value) {
-        return value.replace(/!\[.+\.jpe*g\)$/, '');
+        return value.replace(/!\[.+\.(?:bmp|gif|jpe*g*)\)$/, '');
       });
     }, this));
   };