Add possibility to add/remove Locallab tools

Change:
- Use tools list widget to add a Locallab tool to currently selected
spot. Remove Locallab tool from currently selected spot using cross on
tool title bar

Note:
- Spot parameters list in .pp3 file isn't optimized according to
added/removed Locallab tools

rtengine/procevents.h

@@ -662,7 +662,7 @@ enum ProcEventCode {
     Evlocallabsensihs = 632,
     Evlocallabradmaskcol = 633,
     Evlocallabradmaskexp = 634,
-//    EvlocallabshowmaskSHMethod = 635,
+    EvlocallabToolAdded = 635,
     EvlocallabCCmaskSHshape = 636,
     EvlocallabLLmaskSHshape = 637,
     EvlocallabHHmaskSHshape = 638,
@@ -700,7 +700,7 @@ enum ProcEventCode {
     EvlocallabLLmaskcbshape = 670,
     EvlocallabHHmaskcbshape = 671,
     EvLocallabEnacbMask = 672,
-//    EvlocallabshowmaskcbMethod = 673,
+    EvlocallabToolRemovedWithoutRefresh = 673,
     Evlocallabsoftradiustm = 674,
     EvLocallabSpotTransitgrad = 675,
     Evlocallabamount = 676,
@@ -714,7 +714,7 @@ enum ProcEventCode {
     Evlocallabchromaskreti = 684,
     Evlocallabgammaskreti = 685,
     Evlocallabslomaskreti = 686,
-//    EvlocallabshowmaskretiMethod = 687,
+    EvlocallabToolRemovedWithRefresh = 687,
     EvLocallabEnaretiMasktmap = 688,
     Evlocallabscalereti = 689,
     Evlocallabdarkness = 690,