IdeIntf, Object Inspector: Improve hiding / showing the info panel and statusbar.

git-svn-id: http://svn.freepascal.org/svn/lazarus/trunk@46374 4005530d-fff6-0310-9dd1-cebe43e6787f
IdeIntf, Object Inspector: Make sure the top splitter goes always to right place.

git-svn-id: http://svn.freepascal.org/svn/lazarus/trunk@46375 4005530d-fff6-0310-9dd1-cebe43e6787f