Add ui::Widget::getGraphics() and GraphicsPtr
Add ui::Graphics::fillRegion()
Add live preview to tiled mode

- Removed draw_emptyset_symbol() function
- Added DocumentSettingsObserver
- Moved Editor's painting code from onProcessMessage to onPaint
Fix issue 338: Double Clicking Timeline While Holding Control Crashes the Program
Fix UISettingsImpl::setBgColor() so right click with eye-dropper set background color
Make ScreenScale option configurable through UI
Move code to handle Windows clipboard (text) to ui/clipboard_win.h
Move config.h to src/ directory
Fix issue 341: cannot scroll Timeline with space bar
Minor fix for timeline header of frames
Fix crash in Entry::getCaretFromMouse()
Don't scroll Entry text if it isn't needed
IntEntry: select all text when the value is changed with the slider
slider.cpp: Remove commented code
Now you can press a mouse button in a IntEntry and drag the mouse to the slider (issue 339)
Now you can press a mouse button in a ComboBoxEntry and drag the mouse to the ComboBoxListBox (issue 339)
Remove SnapBehavior::SnapInRightBottom which is confusing (fix issue 343)
Fix issue 337: Vertical flip and Horizontal flips functions affect more than selected area
Fix bug loading/saving .gif files with Unicode file names
Fix issue 347: Eyedropper tool changes in gui.xml (pick_fg ink) not working