As of df3a21d97b, this panel has two "Browse..." buttons, and is the
first to do so. On Windows, the shortcut for this file chooser button
was hardcoded to 'w', causing an assertion failure whenever switching to
the Auth panel.
I've just removed the shortcut -- there are others near enough that it's
easy to reach the "Browse..." button with Tab.
Correcting a source file name in the docs just now reminded me that
I've seen a lot of outdated source file names elsewhere in the code,
due to all the reorganisation since we moved to cmake. Here's a giant
pass of trying to make them all accurate again.
This gets rid of all those annoying 'win', 'ux' and 'gtk' prefixes
which made filenames annoying to type and to tab-complete. Also, as
with my other recent renaming sprees, I've taken the opportunity to
expand and clarify some of the names so that they're not such cryptic
abbreviations.
