Panel base class.
More default stuff in config namespace.
Getters for width and height in Frame.h
Getters for X, Y.
Updated constructor to include frame texture.
Getters
Draw text relative to window position.
Lot's of minor changes to several files.
KeyboardListener class
Add keyboard listeners and event callbacks to Core class.
Don't delete closed panels.
Use std::unique_ptr in MessageEvent.
Keyboard events in panel.
CommandChooser inherits from Panel.