SOLR-4264: Missing Error-Screen on UI's Cloud-Page (merge r1429254)

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/branches/branch_4x@1429255 13f79535-47bb-0310-9956-ffa450edef68
SOLR-4261: Percentage Infos on Dashboard have a fixed width (merge r1429256)

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/branches/branch_4x@1429257 13f79535-47bb-0310-9956-ffa450edef68