Fixed RouteLink placed inside an element with Events.Click attribute

[adamjez]

This PR fixes RouteLink placed inside an element with Events.Click attribute. Currently, the RouteLink redirection is canceled and command is invoked.

Example:

<dot:GridView DataSource="{value: ...}">
        <RowDecorators>
            <dot:Decorator Events.Click="{command: ...}" />
        </RowDecorators>
        <Columns>
            <dot:GridViewTemplateColumn>
                <dot:RouteLink Text="Test Click Propagation" RouteName="Default"/>
            </dot:GridViewTemplateColumn>
        </Columns>
</dot:GridView>

What do you think about letting people control when the `event.stopPropagation()' is rendered and when not.

[exyi]

I'm afraid this is basically a feature that was added by the event.stopPropagation() :(

[exyi]

I don't really like this solution as it will only work for RouteLinks and not other clickable components (inputs, normal links, ...). I'm afraid that the only correct solution is not to use Events.Click on a container that contains other clickable stuff.

[exyi]

Although I don't really like this unsystematic solution it's still better than nothing... @adamjez Thank you.