Linux: Moved more event handling logic to java
Linux: Removed redundant include statements
Linux: Moved current_win to java
Linux: Moved screen from native to java
Linux: Moved the pointer warp X11 atom from native to java
Linux: Moved another Display instance to java
Linux: Added sanity check to LinuxDisplay.getDisplay()
Linux: Moved Display pointer from native to java
Linux: Simplified LinuxMouse