[vdr] range-select in live plugin

I was getting carpal tunnel symptoms trying to select multiple recordings for deletion in the live plugin, so I made a patch to add range selection using the Quickboxes mootools plugin. It works by allowing you to click and hold the mouse, while moving over subsequent selection checkboxes of recordings.

Is the live plugin still being maintained? It seems most activity halted about four years ago.

This patch is a bit rough, so some testing in different browsers might be required. The Quickboxes plugins i MIT licensed, so can safely be included if accepted.