visual icon bug with bridging units

[adek670]

Quick cosmetic bug in the icons for bridging engineer units.

When on the move the regular engineers revert to the M35 icon when giving a movement order and are on the move.
Engineer bridging units remain as the original icon with no change to the M35 icon.

[CapnDarwin]

The engineers (leg) will switch to the Engineer icon when dismounted, and the truck when on the move like other mounted units. The Short Span Bridge is a vehicle and does not "flip" modes as it has no personnel dismounts.

[adek670]

ah ok,

I thought the pioneers in the unit would, but if thats the rationle, cool