Allow changing date on trip

[tarquinwj]

On the Current Trip page, add a few cavers, and a comment. Tap the Save button on the top toolbar. Go to plan view. go back to Current Trip page. All information you added there is lost.

You need to tap the "Save Trip" button at the bottom, but it is too easy to make the mistake of assuming the normal Save button will work. Data loss is not fun.

Oh, and while I am on the topic, it would be lovely to be able to change the date of the trip in case you are filling it in after the actual trip...

[richsmith]

Save button now saves trip info, and info is preserved if you move between screens. Changing issue name to just the date thing.