Legacy: Minecraft Launcher 1.6.84-j does not set game window resolution to that of the profile

Expected Behavior
When setting a Profile resolution and not in full screen, the expected game window resolution should match that of the profile.

Actual Behavior
The resulting game window resolution always defaults to 854 x 480.

Steps to Reproduce
With overrideWidth:0, overrideHeight:0, fullscreen:false in options.txt:

1. In the Profile Editor tick Resolution and set a resolution greater than 854x480 but less than full screen.
2. Save the profile.
3. Click the Play button.