Can't place mines ontop of mountains in the editor

[Mr-Bajs]

Preliminary checks

• I've checked that there aren't other open issues on the same topic.
• I've checked that this issue is reproducible on the latest snapshot build.

Platform

Linux

Describe the bug

In the original map editor och kan place mines on top of mountains to the sort of blend in nicely with the mountain.

However if you try to do it in fheroes2 map editor you'll get the error message.
"Action objects must be places on clear tiles."
And hence you can't design a map in the style of the original game.

Save file

.

Additional info

No response