Saxon

Updated the design of the documentation app, to remove the difference for touch and click events.

The previous app design assumed that devices only used one or the other type of event, with separate (but very similar) event handling templates for the different cases (with mode="ixsl:onclick" and mode="ixsl:ontouchend"). The "onclick" templates were then disabled for a device which allowed touches.

In the redesign, we no longer need separate templates specifically for touch events. It is now standard for touch events to trigger click events (if they are not cancelled during an interaction, e.g. by moving the touch), so the click event handling templates are sufficient. (I guess this was not the case previously, when the Saxon-CE documentation app was originally designed.)

Specifically, the use of the $usesclick variable defined in viewer_app/xsl/cetree.xsl has been removed, and the "ixsl:ontouchend" templates removed.

9.7 online documentation app updated. Changes committed for the 9.7 and 9.8 dev branches. (Perhaps the older 9.6, 9.5, and 9.4 documentation apps online should likewise be updated, but I have not done this at present.)

Bug fix applied in the Saxon 9.7.0.18 maintenance release.