Dynamic daysleft

Days left label is now dynamic until it hits zero

Main menu buttons are disabled once days left hits zero

The max amount label in the budget window should display correct max amount

Added checkstyle changes

changed milestone to %Final product and documentation

added Backend Documentation Frontend labels

requested review from @hssoreid

assigned to @harrylx

approved this merge request

approved this merge request

merged

mentioned in commit a76b0a1c