Trebuchet: Adjust the icon size to the grid size

[ghostrider-reborn: also adjust text sizes]

- Hotseats for 4_by_5 is 4
- Keep camera in hotseat and remove contacts.

Co-authored-by: Adithya R <gh0strider.2k18.reborn@gmail.com>
Change-Id: I02ff29cc14e5d4288a34dbd8c4658f7cea7d579f
Signed-off-by: althafvly <althafvly@gmail.com>