[Feature Request] Status display if muffler hatch is blocked

[MauveCloud]

Today I had some trouble with a large gas turbine which I tracked down to having the muffler hatch pointing the wrong way (I thought I'd redirected it while building the multiblock, but I can't prove it; Confusingly, it ran long enough to fill 4 lapotron crystals to 240k EU each in a battery buffer, so either it delayed checking that or it spontaneously rotated the muffler hatch later, I'm not entirely sure which is more likely).

However, the GUI of the multiblock gave no indication of this, and I'd put the muffler hatch on top where it wasn't easy to check. Admittedly, with a gas turbine I could have placed it in a different position where it was more visible, but other multiblocks (obviously ignoring the ones that don't require a muffler hatch) are more restrictive, so it would be nice to have an indication of this in the multiblock's GUI.