Locallab cleanup #1

Cleanup of Locallab and ControlSpotPanel
Removed also useless LocalListener, useless Locallab options

The following improvments have been introduced:
- All Locallab events are now managed with regular RT logics

The following bugs have been corrected:
- Missing "sensiexclu", "struc" (hidden) and "noisechrodetail" (hidden)
adjusters have been reintroduced
- GUI problems reported by @ganned92 have been corrected
- Tone curve could have some weird behavior when mouse was moving a
curve point outside curve editor

rtengine/dcrop.cc

@@ -888,7 +888,7 @@ void Crop::update(int todo)
         int sca = skip;
 
         //     bool tyty = false;
-        int maxspot = settings->nspot + 1;
+        int maxspot = 1;
 
         if (needslocal) {
             for (int sp = 0; sp < params.locallab.nbspot; sp++) {