New screenshots added 7 May 2024
Both taken on Chrome Version 124.0.6367.119 (Official Build) (x86_64):
100% zoom when project side bar is closed:

90% zoom when project side bar is closed:

100% zoom when project side bar is opened:

90% zoom when project side bar is opened:

This issue get worse the wider the monitor is.

Original description

The new UI layout for issue display wastes a lot of space on empty margins, which could be used for the display of the data.

see screen shot (below):

Even when the screen has been maximized the ticket detail continues to confine itself to an artificial margin area.

This has been so troubling that one of our developers wrote a chrome extension to try and force one of our custom fields - "acceptance criteria" to take up the entire space. 

Obviously this is a band-aid and is prone to breaking.  This is a problem that needs to be fixed within the product code itself.