LinuxEventDeviceTracker: shift-modifier

Signed-off-by: Xerxes Rånby <xerxes@zafena.se>
LinuxEventDeviceTracker: 4 space indentation

Signed-off-by: Xerxes Rånby <xerxes@zafena.se>
LinuxEventDeviceTracker: ALT, ALT_GRAPH & CTRL modifiers.

Signed-off-by: Xerxes Rånby <xerxes@zafena.se>
Merge remote-tracking branch 'xranby/NEWT-input'

Conflicts:
	src/newt/classes/jogamp/newt/driver/linux/LinuxEventDeviceTracker.java
LinuxEventDeviceTracker: Reapply changes from commit b13868b612689307ebf4e46ee4ede2fd0560e504, which got lost via my merge conflict resolution (duh).