Fix saving order of open databases

* Order of previously open databases are preserved when closing the application
* The active database on closing remains active after startup
* Nested open previous databases and remember key files under the remember previously open databases setting
* Fix #1675

src/core/Bootstrap.cpp

@@ -112,6 +112,10 @@ namespace Bootstrap
                     mainWindow.openDatabase(filename);
                 }
             }
+            auto lastActiveFile = config()->get("LastActiveDatabase").toString();
+            if (!lastActiveFile.isEmpty()) {
+                mainWindow.openDatabase(lastActiveFile);
+            }
         }
     }