Hi, I just joined the community, best wishes to all!
I removed the panel by mistake. Is there a way to restore the default? I don't have access to network settings/wifi. Also I use dropbox, and the dropbox icon also dissapeared. Is there a workaround to restore all these?
in mate tweak: select panel
In this window you can select a panel layout which puts you directly back in business.
tip1
You probably want to customize the panel a bit.
It might be a good idea to save your customized layout in mate tweak
Because if it happens again, you can call your customized layout directly with the steps described above.
tip 2
You also might want to lock your panel so that you can't delete/destroy it again.
The easiest way is from the terminal
To lock the panel:
gsettings set org.mate.panel locked-down true
To unlock the panel:
gsettings set org.mate.panel locked-down false
But you can also do this from a GUI like dconf-editor.