[V1.3 - Ground Combat] C4 explosion radius not displayed

[wulf 21]

Minor usability issue: Unlike with frag grenades it is currently not possible to know wether it is save to blow up C4 without hurting Xenonauts. The obvious place to display the radius would be when you mouse over the remote detonator like I have done in the screenshot. (GOG galaxy somehow takes screenshots without mouse pointer but it can be seen that the background of the detonator is slightly brighter). Another place where it would be possible is while planting it, but there it is not displayed either.