* ThreadSeach: Change the options icon in the toolbar and in the panel, when an option is selected

git-svn-id: https://svn.code.sf.net/p/codeblocks/code/trunk@9174 2a5c6006-c6dd-42ca-98ab-0921f2732cef
- improve the update_revision.sh script to work better with git

* Disable the 'git svn info' path, because it fails badly with git 1.8.x.
* Rework the 'git log' path to work better - it finds the last svn commit
  in the graph and extracts the revision.
* Rework the 'git log' path to get the date of the last commit in a format
  similar to the way svn gets it (YYYY-MM-DD hh-mm-ss).

git-svn-id: https://svn.code.sf.net/p/codeblocks/code/trunk@9175 2a5c6006-c6dd-42ca-98ab-0921f2732cef