fixed focus loss

What's Changed

• Fix/focus loss by @Nummer42O in #10
• Fix/primary secondary text mismatch by @Nummer42O in #11

Alternate cancel methods

Added options to:

cancel by pressing escape
cancel by pressing next to the dialog, aka defocusing the window

Initial release

The first release introduces the base functionalities:

• starting the program opens a dialog while darkening the background
• the dialog contains a cancel, restart and power off option with respective effects
• the default action (highlighted by default and executed after timeout) is power off and can be switched using --restart cli argument