Free naval units are always added to coastal cities

Can offer Research agreements with gold, if other civ can't cover the cost  - By tuvus

By SomeTroglodyte:
- Can select tile north of city for bombard!
- Fixed 'Transfer Movement' stopping healing
- Fix next-turn not offering Policy Picker for free Policies
- Fix intended Longpress-to-move on Android not working
- A few more useful notification actions