First attempt to redesign the PostCreationPage
Improve PostCreationPage design
Use one composer page for both threads and posts
Added signature settings
Show loading dialog when submitting a message
Fix margin issue
Fix error handling
Added an automatic draft feature to MessageComposerPage
Remove unnecessary comment
Enable drafts for new threads
Show error dialog if no message has been entered
Fix drafts for subscriptions
Merge pull request #39 from nikwen/unifiedThreadPostCreationPage

Unified thread/post creation page and drafts for posts