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

rtgui/locallabtools.h

@@ -34,7 +34,8 @@ public:
     LocallabToolListener() {};
     virtual ~LocallabToolListener() {};
 
-    virtual void resetOtherMaskView(LocallabTool* current) {};
+    virtual void resetOtherMaskView(LocallabTool* current) = 0;
+    virtual void toolRemoved(LocallabTool* current) = 0;
 };
 
 
@@ -122,7 +123,8 @@ public:
     }
 
     // Management functions to add/remove Locallab tool
-    void addLocallabTool(bool cond);
+    void addLocallabTool(bool raiseEvent);
+    void removeLocallabTool(bool raiseEvent);
     bool isLocallabToolAdded();
 
     // Mask background management function