If you don't want to delete the file, I wasn't sure if it deleted all of the cursor actions, just change the "over enemy" part of the diplomats actions to this:
over enemy
{
default Na tooltip cannot_perform_mission
land Mov Mov
sea Na Na tooltip characters_cannot_go_on_sea
army TB Na tooltip diplomacy_mission
diplomat T Na tooltip diplomacy_mission
princess T Na tooltip diplomacy_mission
family T Na tooltip diplomacy_mission
settlement T Na tooltip diplomacy_mission
fort T Na tooltip diplomacy_mission
rally_point Mov
naval_rally_point Na Na tooltip characters_cannot_go_on_sea
garrisoned_settlement TB Na tooltip diplomacy_mission
garrisoned_fort TB Na tooltip diplomacy_mission
port Mov
So it mirrors the over allied part and you should be fine.

I wouldn't copy and paste this though, the spaces are different to what is required in the file