Remove MainFormOnTaskBar, revert r3763, to fix issue #2640. Disables support for Windows Flip3D, but who cares.

git-svn-id: http://heidisql.googlecode.com/svn/trunk@4371 560a3889-bb33-0410-9f33-43a8a102dc09
Same as r4304: Fix broken drop down buttons on main toolbar, now that MainFormOnTaskBar is missing.

git-svn-id: http://heidisql.googlecode.com/svn/trunk@4372 560a3889-bb33-0410-9f33-43a8a102dc09
Return focused tree item in GetFocusedObjects() even if tree is not focused, in cases where database tab does not has focus. Fixes issue #3146.

git-svn-id: http://heidisql.googlecode.com/svn/trunk@4373 560a3889-bb33-0410-9f33-43a8a102dc09
Propose column names from selected table in filter panel. Fixes issue #3140.

git-svn-id: http://heidisql.googlecode.com/svn/trunk@4374 560a3889-bb33-0410-9f33-43a8a102dc09
Check KeepAskingSetting in MessageDialog() on older Windows versions. Broken since r4302. Fixes issue #3147.

git-svn-id: http://heidisql.googlecode.com/svn/trunk@4375 560a3889-bb33-0410-9f33-43a8a102dc09