How to disable letterboxing and adjust UI5 for the widescreen?

Question

I have an UI5-based app (1.66+), which works correctly, but there are huge empty spaces on the left and right sides of the screen (aka letterboxing is on):

Answer 1

According to Available OpenUI5 Versions the newest OpenUI5 version is 1.65.0. How is you app based on 1.66.0?

Setting appWidthLimited: false on the sap.m.Shell should do the work. Check out this example (plunker / github) (in the Plunker run preview in a new window)