Change tracking:

Change tracking:

        src/paragraph.h:
        src/paragraph.C:
        src/paragraph_pimpl.h:
        src/paragraph_pimpl.C: setChange(...) replaces markErased(...);
        pass Change parameters as const reference
        src/insets/insettext.C: adjust accordingly
        src/changes.h:
        src/changes.C: pass Change parameters as const reference

git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@15366 a592a061-630c-0410-9148-cb99ea01b6c8