The welcome screen now has an extra prelude for Alphas, and as result no longer needs to force a version check onto our website. Users can still do that by clicking "check online".
I've also rearranged the version check code a little, so that there is better reuse. E.g. we can change the URL in just one place in the code.
This brings more of the code from DarkAudacity into Audacity, though not yet enabled. This will make cherry picking later easier.
- Changing colour of html displays now possible, as colour links are visible for substitution. (Can't use css as wxHTML is very limited).
- Export can now be preset to a particular format independent of preferences.
- SnapTo reversion on zoom now a DA controlled option.
- Caching of pinning preference for faster repaint because preferences are slow.
- Record Append now has sensible limit on number of tracks, rather than giving an error, and flipping the meaning of shift is now DA controlled.
Discussion on -quality pointed out that (1) in alphas the '!' is emphasising the year, 2016, rather than the 'Welcome', that (2) in release the '!' can easily be misread as a 1 and so part of the version number (3) the topic is "How to Get Help", rather than the welcome (4) too many !!!!'s are OMG!!! culture (5) we already have an "!" in the title.
