Design goal: Allow the use of layout "modules", which are to LaTeX packages as layout files are to LaTeX document classes. Thus, one could have a module that defined certain character styles, environments, commands, or what have you, and include it in various documents, each of which uses a different document class, without having to modify the layout files themselves. For example, a theorems.module could be used with article.layout to provide support for theorem-type environments, without having to modify article.layout itself, and the same module could be used with book.layout, etc.
This patch adds the GUI for managing modules.
git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@20282 a592a061-630c-0410-9148-cb99ea01b6c8
That makes another simplification both possible and desirable. For some reason, whenever you change the Document Class combobox in Document Settings, LyX tries to read whatever you choose _before_ you try to hit "Apply". Why? I see no good reason. You get the warning earlier that way, but maybe you weren't going to try to load it anyway and were going to change your mind. So I have removed that behavior, in which case you'll get the warning when you try to apply the parameters. This means we can also remove ControlDocument::loadTextclass().
git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@19965 a592a061-630c-0410-9148-cb99ea01b6c8
