Fix function: "Restore recovery" 1/2

Twrp use "$ flash_image $MTD_Name" (or something like this) to restore
the recovery, but "flash_image recovery" will write recovery also on the
boot partition.

Instead "$ flash_image recoveryonly" will write recovery only on the
recovery partition.

Signed-off-by: HandyMenny <handymenny@outlook.com>
Fix function: "Restore recovery" 2/2

This will fix "$ dump_image recoveryonly".

Signed-off-by: HandyMenny <handymenny@outlook.com>
gui: delete fonts

In my opinion the default font (font_7x16) is better.
gui: portrait.xml: Swap reboot_bootloader and reboot_download