- a few issues to work out still, and editor changes not done yet
- for communication between webengine and python code, we set window
.location to 'http://anki/<something>' - the leading http is
necessary for qt to call the link handler, which was introduced
in qt5.5
- the designer files now use a promoted qobject to create instances
of AnkiWebView
- we use the css zoom property to alter webengine font size based on
system dpi
- prefs and addons folder stored in new location (at least for now)
- tweak sync code so that a failure in loading the collection
won't leave the app with an unopen collection
- don't show corrupt collection message when the error is not
a db error
- catch the temp folder issue when loading the collection. i suspect
this was the issue that was causing some people to end up with
an open anki instance with no collection loaded
