Editing entry with hybrid heading (link and text) changes heading when updated

[mbafford]

BT Version: 0.9.6 / Chrome

Problem

Discovered as part of #13 - which allows you to introduce this state entirely within BT - although I think anyone who edits the org file externally will encounter this issue.

If you create a complex heading that has a link and text, it renders fine in the tree:

However, editing the entry will break the structure:

Proposed Solutions

• Accept as-is - the title will always be a full link - maybe add a warning that saving will change the heading irrevocably
• Make the heading read-only if it's not in standard BT format - in which case, you can still edit the description field without affecting the heading
• Add a toggle button which allows for editing in org syntax or plain-text syntax, which the caveat that plain-text will wipe out custom syntax (and would then default to org editing if this scenario is encountered)

[tconfrey]

I like the third option. The note field is already, by default, plain text but at some point I'd like to support a more naive user friendly markup editor. So being able to switch back and forth makes sense.