_createSubWidgets on ContentPane should care for attach events and attach points

[[email protected]…]

When using lazy creation of costum widgets (with widgetsInTemplate: true) the attach events/points aren't processed.

for example this template part:

    <div dojoAttachPoint="dialogNewIndicator" dojoType="dojo:Dialog" bgColor="white" bgOpacity="0.75" style="display: none">
        <div dojoType="mapper:NewIndicator" dojoAttachEvent="onCancel: cancelNewIndicator; onCreateIndicator: onCreateIndicator"></div>
    </div>

the event onCancel in mapper:NewIndicator is invoked but not cancelNewIndicator on the current widget.

[[email protected]…]

sub widgets are created twice if widgetsInTemplate is true

[bill]

(In [7109]) Rollback deferred creation of subwidgets (at least temporarily). It causes various problems and will probably conflict with the new parser code for finding subwidgets. Fixes #2260.