[Sprint/HipsterHedgehog](bug): Fix mobile group chat disapearing on keyboard #1416

Closes #1416 (closed)

I've hit my head off this one for a while but the only way I could find to do it, leaves a bit more of a gap than I would like on some tested phones (see s7 edge)

S7 edge Brave:

(this is through chrome report so note that the keyboard area just appears as white)

iPhone 8 Safari

Pixel XL Firefox