Improve mask preview and avoid reprocessing when switching spot

Changes:
- Mask preview has been improved. It only applies on detailed image now
("dcrop" pipeline) which corrects unexpected behavior on navigator
image. Mask preview now only applies on selected spot: when switching
between spots, mask preview is deactivated on newly selected spot.
- Image reprocessing is now avoided when switching between spots (except
if mask preview was previously activated). Mask background update
remains functionnal.

Bugfixe:
- AStyle runned on several modified files

rtengine/procevents.h

@@ -631,8 +631,8 @@ enum ProcEventCode {
     Evlocallabsensisf = 601,
     Evlocallabsharblur = 602,
     EvLocenalabregion = 603,
-    EvlocallabshowmaskcolMethod = 604,
-    EvlocallabshowmaskexpMethod = 605,
+    EvlocallabshowmaskMethod = 604,
+    EvLocallabSpotSelectedWithMask = 605,
     EvlocallabCCmaskshape = 606,
     EvlocallabLLmaskshape = 607,
     EvlocallabCCmaskexpshape = 608,
@@ -662,7 +662,7 @@ enum ProcEventCode {
     Evlocallabsensihs = 632,
     Evlocallabradmaskcol = 633,
     Evlocallabradmaskexp = 634,
-    EvlocallabshowmaskSHMethod = 635,
+//    EvlocallabshowmaskSHMethod = 635,
     EvlocallabCCmaskSHshape = 636,
     EvlocallabLLmaskSHshape = 637,
     EvlocallabHHmaskSHshape = 638,
@@ -700,7 +700,7 @@ enum ProcEventCode {
     EvlocallabLLmaskcbshape = 670,
     EvlocallabHHmaskcbshape = 671,
     EvLocallabEnacbMask = 672,
-    EvlocallabshowmaskcbMethod = 673,
+//    EvlocallabshowmaskcbMethod = 673,
     Evlocallabsoftradiustm = 674,
     EvLocallabSpotTransitgrad = 675,
     Evlocallabamount = 676,
@@ -714,7 +714,7 @@ enum ProcEventCode {
     Evlocallabchromaskreti = 684,
     Evlocallabgammaskreti = 685,
     Evlocallabslomaskreti = 686,
-    EvlocallabshowmaskretiMethod = 687,
+//    EvlocallabshowmaskretiMethod = 687,
     EvLocallabEnaretiMasktmap = 688,
     Evlocallabscalereti = 689,
     Evlocallabdarkness = 690,
@@ -726,7 +726,7 @@ enum ProcEventCode {
     Evlocallabequiltm = 696,
     Evlocallabfftwlc = 697,
     Evlocallabfftwreti = 698,
-    EvlocallabshowmasksoftMethod = 699,
+//    EvlocallabshowmasksoftMethod = 699,
     Evlocallabshadex = 700,
     EvlocallabexpMethod = 701,
     Evlocallablaplacexp = 702,
@@ -741,7 +741,7 @@ enum ProcEventCode {
     Evlocallabchromasktm = 711,
     Evlocallabgammasktm = 712,
     Evlocallabslomasktm = 713,
-    EvlocallabshowmasktmMethod = 714,
+//    EvlocallabshowmasktmMethod = 714,
     EvlocallablocalcontMethod = 715,
     EvlocallabwavCurve = 716,
     Evlocallablevelwav = 717,