added missing constructor for buttons
fix #274 add getTitleToolTip() method to WorkbenchPart, works in UI thread
Waits until tree item has at least one child when searching for tree item via specified path
REDDEER-251: Remove SWTBot dependencies from BrowserView
REDDEER-197: SWTBot-less implementation of Shell
Removed SWT Bot from ToolBarTest

The old implementation caused problems, it always found toolbar in other view.
REDDEER-306: View is sometimes not opened
Fixed priting stacktrace via RedDeer logger
REDDEER-311: Cannot find Markers view on Mac
REDDEER-200: SWTBot-less implementation of TabItem
REDDEER-249: SWTBot-less implementation of DriverDefinitionPage