Don't update the project amount needed after donation.

BB-895 #resolve
Merge pull request #518 from benkonrath/donation-tweaks

Don't update the project amount needed after donation.
Donation copy update.

BB-901 #resolve
Donation copy update 2.

BB-902 #resolve
Donation copy update 3.

BB-903 #resolve
Merge pull request #520 from benkonrath/donation-tweaks

Donation tweaks