Fix opening files from command line

* Fix #2877 - password is unchecked by default
* Smarter activation of key components based on contents of text entry fields
* Prevent multiple copies of the same database from opening when the canonicalFileName != fileName

src/core/Database.h

@@ -82,6 +82,7 @@ public:
 
     QUuid uuid() const;
     QString filePath() const;
+    QString canonicalFilePath() const;
     void setFilePath(const QString& filePath);
 
     Metadata* metadata();