Allow more absolute paths in Config

Elwig/Helpers/Config.cs

@@ -23,7 +23,7 @@ namespace Elwig.Helpers {
 
             if (ini == null || !ini.TryGetKey("database.file", out string db)) {
                 DatabaseFile = App.DataPath + "database.sqlite3";
-            } else if (db.Length > 1 && db[1] == ':') {
+            } else if (db.Length > 1 && (db[1] == ':' || db[0] == '/' || db[0] == '\\')) {
                 DatabaseFile = db;
             } else {
                 DatabaseFile = App.DataPath + db;