Update v5.0.3 — Endless ATC Steam update #859611

A small update with a couple of improvements and adjustments. Changelog: Improvements to scenario mode, mainly extending some of the time limits to make it less hard to complete them: EDDF +2 minutes, KATL +2 minutes, LFPG +2 minutes, RJTT +1 minute, CYYZ +1 minute, YSSY +1 minute. Rewind button becomes available earlier, as soon as 2 minutes since the rewind button has been pressed.Added text mode 1 to the display menu, to declutter the background screen but keep altitude restrictions visible. Fixed incorrect keyboard inputs on non-QWERTY layouts. And for custom airports: Added NAV mode for planes on an approach route. NAV mode cancels any altitude/speed restrictions on a route. Similarly to the LLZ mode (which can be used to avoid glideslope capture), NAV mode is enabled by longpressing on the altitude digits (so between the plus and minus altitude buttons), or by typing NAV. Later on,...