* Disable Mrexcelhtmlmaker20170804
* Before disabling Forum Tools add-in, run the macro "CleanUp" from Forum Tools (found in the mUI module).
Confirm before disabling add-in that all right-click context menus related to HTML Maker/Forum Tools are removed.
* Close/Open Excel
* Enable Forum Tools add-in
* Here is where I experience the issue that the right-click context menus are not created,
as for some reason the workbook_open event isn't firing.
* Close/reopen Excel here, the menus will get properly created. I assume that enabling an add-in
while Excel is open does not trigger the workbook_open() event.
* Deactivate Forum Tools add-in
* Because the add-in is being deactivated, similar to the workbook_open() event not firing, the
workbook_beforeclose() event isn't firing. Because of this, the macro "CleanUp" is never running.
* This is where the latent right-click menus are sticking around.
* Closing/Reopening Excel does NOT clear these out. They must be cleared using the CleanUp macro.
* If you try clicking one of these, Excel appears to hang. If I press Esc, it goes to the Forum Tools addin code.