clear name edits when opening alchemy / spell creation

apps/openmw/mwgui/alchemywindow.cpp

@@ -132,6 +132,8 @@ namespace MWGui
         openContainer (MWBase::Environment::get().getWorld()->getPlayer().getPlayer()); // this sets mPtr
         setFilter (ContainerBase::Filter_Ingredients);
 
+        mNameEdit->setCaption("");
+
         mAlchemy.setAlchemist (mPtr);
 
         int index = 0;

apps/openmw/mwgui/dialogue.cpp

@@ -170,7 +170,7 @@ void DialogueWindow::startDialogue(MWWorld::Ptr actor, std::string npcName)
     setTitle(npcName);
 
     mTopicsList->clear();
-    mHistory->eraseText(0,mHistory->getTextLength());
+    mHistory->setCaption("");
     updateOptions();
 }
 

apps/openmw/mwgui/spellcreationdialog.cpp

@@ -291,6 +291,7 @@ namespace MWGui
     void SpellCreationDialog::startSpellMaking (MWWorld::Ptr actor)
     {
         mPtr = actor;
+        mNameEdit->setCaption("");
 
         startEditing();
     }