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/data/Storage.cpp

@@ -81,8 +81,10 @@ void Storage::clearFileElement(const FilePath& filePath)
 	Id fileId = getFileNodeId(filePath);
 	if (fileId != 0)
 	{
+		m_sqliteStorage.beginTransaction();
 		m_sqliteStorage.removeElementsWithLocationInFile(fileId);
 		m_sqliteStorage.removeFile(fileId);
+		m_sqliteStorage.commitTransaction();
 	}
 }