\IfFileExists does not search in texmf/fonts, so the \TestPackage test fails for font files. Add a new \TestFont check that adapts the font check from ltxcheck.tex.
This is needed for the minion2newtxmath test, since this package only consists of font files,
In 0aead96461 it was introduced that the toolbar popup menu buttons are not
initialized until they are being used (i.e. pressed at for the first
time). As a consequence, these buttons are always enabled on start. Now
that we have the sticky button for view and update, I'm now annoyed by
this every time I start LyX.
This addresses #6543 by adding an option to prevent fonts such as Palatino and Times to automatically adapt the math font (IOW it lets you load the text font only for a bunch of fonts where this is easily possible).
Furthermore it adds an interface to select a specific math font, which is defined in latexfonts. Currently, this is only euler (the only one I know), but if there are other math-only tex fonts, they can be added easily (but note that this changes the file format).
Non-TeX math fonts are not yet supported. Eventually, unicode-math support can use the existing UI, but this is not on my agenda.
The LaTeX font now do not specify simply alternative packages or packages for OT1 encoding etc., but they refer to complete AltFonts (which are not directly accessible via the GUI). This way, alternative fonts can also have options (osf, sc etc.), and they can use all sorts of initializing methods (\usepackage, \setrmfamily etc.).
This assures that refs to existing labels are not being touched if a new label with a duplicate name is created, and the name then changed by the duplicate checker.
Branch candidate.
Fix thinko in Undo::endUndoGroup.
Do not reset undo groups in Undo::clean
The underlying problem remains: the various VC functions should not
always reload the buffer or at least should use the parameter
clearUndo=false.
Filenames embraced in <...> can occur anywhere on the line and multiple times. This fixes for me the case that graphics included via ERT were not tracked. It probably also fixes#8336.
This is a candidate for branch.
