MB-21852 - spock UI made btn-xs buttons shorter to fit in rows

Mentioned in point #2 in MB-21852.

Change-Id: I0d8a414e6eecb56fae167f3e3532c771c073a75a
Reviewed-on: http://review.couchbase.org/71080
Reviewed-by: Marty Schoch <marty.schoch@gmail.com>
Tested-by: Steve Yen <steve.yen@gmail.com>

ns_server_static/fts/uia/fts.css

@@ -583,9 +583,7 @@
 }
 
 .indexContainer .index-summary .btn-xs {
-  height: 1.5rem;
   min-width: 5.5rem;
-  line-height: 1rem;
   margin-left: 10px;
   padding: 0 0 0 0;
   font-size: 11px;
@@ -626,6 +624,8 @@
 
 .indexContainer .btn-xs {
   padding: 0px 5px 0px 5px;
+  height: 1.5rem;
+  line-height: 1.5rem;
   font-size: 11px;
   font-family: OpenSans, sans-serif;
 }