logic: fixes all over the place

* fixed refreshing to send another ui refresh message after parsing
* keepContent field for MessageBase so that views won't update
* fixed searchmatching to only weigh uppercase letters next to lowercase ones
* fixed file not jumping back to snippets when activating edge
* clicking into empty space deselects active edge
* clear file manager files on every fetch
* added db transaction for file clearing
* use zooming instead of changing font size

src/lib/component/controller/SearchController.cpp

@@ -14,7 +14,7 @@ SearchController::~SearchController()
 
 void SearchController::handleMessage(MessageActivateTokens* message)
 {
-	if (!message->isEdge)
+	if (!message->keepContent())
 	{
 		getView()->setMatches(m_storageAccess->getSearchMatchesForTokenIds(message->tokenIds));
 	}