few ui changes

git-svn-id: https://svn.wso2.org/repos/wso2/carbon/platform/trunk@181418 a5903396-d722-0410-b921-86c7d4935375
Upgraded carbon-p2-plugin to 1.5.4-SNAPSHOT

git-svn-id: https://svn.wso2.org/repos/wso2/carbon/platform/trunk@181422 a5903396-d722-0410-b921-86c7d4935375