the shortcut keys are handled by webengine on platforms other than
osx, so rather than messing with an event filter we catch the cut and
copy events in js and send a signal back
this fixes a bug where navigating to the next/previous card using
shortcut keys resulted in the first field being clobbered
- get rid of the stealFocus option in favour of explicitly passing
focusTo to setNote()
- setFields() is no longer responsible for setting focus
- add focusTo var to the browser so that the row changed hook can
restore focus when navigating to next/previous card
- fix the row changed hook being called twice
- the blur event now includes the field number instead of relying on the
editor to have the correct currentField
- the current field is set to null on blur
- use deferred js and a callback rather than keeping track of when we
were loaded
- add shift+tab shortcut to go to previous field
- js code that was previously bundled in .py files is now in the
web folder
- add helpers to create links to bundled files, and update
stdHtml() to accept a list of javascript files to include
instead of text
- render MathJax in card layout and preview screens - these should be
updated in the future to update the document dynamically like the
reviewer does
- start media server earlier so it can be used to serve content for
the toolbar, etc
- work around a bug in WebEngine on Windows that could cause the
media server to hang