Server window database tab tweaks

- Encoding as string instead of id
- Tablespace name instead of id
- Database list sorting enabled
- Database size

pglablib/catalog/PgDatabase.h

@@ -10,12 +10,14 @@ public:
 
 	Oid dba; // owner?
 	int encoding;
+    QString encodingString;
 	QString collate;
 	QString ctype;
 	bool isTemplate;
 	bool allowConn;
 	int connLimit;
 	Oid tablespace;
+    int64_t sizeBytes;
 
 	using PgServerObject::PgServerObject;