In layman terms it controls the size of the image displayed on the screen.
qemu.hw.mainkeys=1
I had noticed this, but not the part about the menu working with the bar there. perhaps we could mod the framework-res.apk to set the height to 0 or something then we would not need to do the qemu.hw.mainkeys=1..
If you change
qemu.hw.mainkeys=0
I use button savior you will get your submenus back, ok lost the three dots in Google play for applications and this fixed my issue. Instead of
qemu.hw.mainkeys=1 , I used qemu.hw.mainkeys=0 after I originally set at 1, hope it helps.
I've been wondering this very same thing for two weeks now myself. Would love if somebody came up with a solution because I do enjoy not having the navbar and being able to use LMT instead. I tried lowering the dpi in build.prop, which does bring back the dot menu for a few apps, but not all. Plus, I'm not very fond of the text being any smaller.