Release process: add section about announcing new release
Update build-osx.md
Merge pull request #3389 from regergregregerrge/patch-1

Update build-osx.md
Merge pull request #3379

4f99b16 Release process: add section about announcing new release (Wladimir J. van der Laan)
[Qt] fix possibilty to delete last sendcoins entry

- hide the entry about to be deleted, and if it is the last entry add a
  new one, so that we always have one entry in our list
Merge pull request #3382

24646ee [Qt] fix possibilty to delete last sendcoins entry (Philip Kaufmann)