QtQuick.Dialogs depends on Qt.labs.folderlistmodel, Qt.labs.settings

But the dependency is hidden behind dynamic loading in plugin.cpp;
so for qmlimportscanner to know about it, we have to declare it,
and qmlimportscanner needs to react to the "depends" line in qmldir.

Task-number: QTBUG-41489
Change-Id: I739791e07a72d628f8c08d067566631c59c7375e
Reviewed-by: Eskil Abrahamsen Blomfeldt <eskil.abrahamsen-blomfeldt@digia.com>

src/dialogs/qmldir

@@ -2,3 +2,5 @@ module QtQuick.Dialogs
 plugin dialogplugin
 classname QtQuick2DialogsPlugin
 typeinfo plugins.qmltypes
+depends Qt.labs.folderlistmodel 1.0
+depends Qt.labs.settings 1.0