fix contact selection header theming

Fixes #1343
// FREEBIE
Add time to messages when they are within the week

//FREEBIE
Merge pull request #1368 from mcginty/contact-select-header-dark

fix contact selection header theming
Merge pull request #1383 from jocelynthode/master

Add time to messages when they are within the week
Slightly more verbose "no legacy support" message.
Replace XML serializer in plaintext export
Fixes #342
Alternative to #929
- changed XML escaping to charwise replacement
- seperated drafts on import
- improved access modifiers
Merge remote-tracking branch 'origin/xmlBackup2_Test' into xmlBackup2-4_Test