Allow Empty Subject

Z 4 z 5 gwězdkow pógódnośony

wót rvs070 dnja Jan. 6, 2010 · trajny wótkaz

I really like this add-on, so I'm sorry to report that it actually broke Tb3. I did the usual trick of changing the most recent compatible version in the install.rdf file inside the .xpi file, which is actually an archive. It worked - the add-on became usable - but it also cause all kinds of weird behavior, like being unable to send or save composed messages.

Please fix it so that it works with Tb3!