Change Locallab tool members from pointers to obj.

Ensures the LocallabTools are destructed when Locallab is.

rtgui/locallab.h

@@ -103,19 +103,19 @@ private:
     LocallabToolList* const toollist;
 
     // Locallab tool widgets
-    LocallabColor* const expcolor;
-    LocallabExposure* const expexpose;
-    LocallabShadow* const expshadhigh;
-    LocallabVibrance* const expvibrance;
-    LocallabSoft* const expsoft;
-    LocallabBlur* const expblur;
-    LocallabTone* const exptonemap;
-    LocallabRetinex* const expreti;
-    LocallabSharp* const expsharp;
-    LocallabContrast* const expcontrast;
-    LocallabCBDL* const expcbdl;
-    LocallabLog* const explog;
-    LocallabMask* const expmask;
+    LocallabColor expcolor;
+    LocallabExposure expexpose;
+    LocallabShadow expshadhigh;
+    LocallabVibrance expvibrance;
+    LocallabSoft expsoft;
+    LocallabBlur expblur;
+    LocallabTone exptonemap;
+    LocallabRetinex expreti;
+    LocallabSharp expsharp;
+    LocallabContrast expcontrast;
+    LocallabCBDL expcbdl;
+    LocallabLog explog;
+    LocallabMask expmask;
 
     std::vector<LocallabTool*> locallabTools;