16th October 2016, 2:42
It seems very strange that my Maui [or also Mint 17.3 before it] does not need that *.sh file that yours calls for, but yet mine all works fine. ???
I personally did not manually install that thunderbird-plasma package, but i just checked now & yes it is installed [presumably therefore it's a part of the standard Maui installation].
It's unclear to me why Cairo-Dock will behave better for you than your Maui Applications Menu in this matter, but as CD is a really marvellous tool to have, i suspect you'll enjoy it anyway... & hopefully it might then also work for you re TB as well as it does for me. I confess however that i still suspect there's something else that we're missing / not noticing, that might be the real root cause of your problem.
What do you see if you try launching TB "my way" but this time in Konsole?
I personally did not manually install that thunderbird-plasma package, but i just checked now & yes it is installed [presumably therefore it's a part of the standard Maui installation].
It's unclear to me why Cairo-Dock will behave better for you than your Maui Applications Menu in this matter, but as CD is a really marvellous tool to have, i suspect you'll enjoy it anyway... & hopefully it might then also work for you re TB as well as it does for me. I confess however that i still suspect there's something else that we're missing / not noticing, that might be the real root cause of your problem.
What do you see if you try launching TB "my way" but this time in Konsole?