Hi
I cannot show any code since the problem is not connected to coding
There is no way to remove specific applet from panel configuration level - You cannot see a list of applets belonging to panel and click one in order to remove.
And if You don't see the applet You can't remove it.
I gave up. Definitely there is sth wrong with mint menu, I found similar reports on other forums but there is no reliable solution.
The menu sometimes appears again and then disappears and so on. It is completely random.
Mint menu sucks, I got rid of it.
Anyway: I'm still very surprised that there is no way to tweak dconf database manually - dconf-editor gives very limited functionality.