Base: fix warnings from code analysers:

* replace some C-style casts with static_cast
* remove unneeded destructors
* define default copy-constructor and assignment operator

src/Base/Uuid.cpp

@@ -65,7 +65,7 @@ std::string Uuid::createUuid()
     QString uuid = QUuid::createUuid().toString();
     uuid = uuid.mid(1);
     uuid.chop(1);
-    Uuid = (const char*)uuid.toLatin1();
+    Uuid = uuid.toLatin1().constData();
     return Uuid;
 }
 
@@ -79,7 +79,7 @@ void Uuid::setValue(const char* sString)
         QString id = uuid.toString();
         id = id.mid(1);
         id.chop(1);
-        _uuid = (const char*)id.toLatin1();
+        _uuid = id.toLatin1().constData();
     }
 }