IDE: when renaming component via F2: mark form as modified

git-svn-id: http://svn.freepascal.org/svn/lazarus/branches/fixes_1_2@46770 4005530d-fff6-0310-9dd1-cebe43e6787f
components: clean up readme, bug 27022

git-svn-id: http://svn.freepascal.org/svn/lazarus/branches/fixes_1_2@46795 4005530d-fff6-0310-9dd1-cebe43e6787f