Revert "little workaround" and "MCF Upload bar is now bigger than one pixel in height."

This reverts commit 3a317cf5201efb96469434b4f320971ae256c544.
and commit 1f343f1ea858a652716599474d64dc691c0ab60d.

also fixes #408 and fixes #362
wx_controls: fix height of gcULProgressBar
Merge pull request #410 from karolherbst/bug408

wx_controls: fix workaround