Jonas Jenwald a97bc16fbc Make the customScaleOption disabled to prevent it being keyboard accessible (bug 1315608)
Given that the `customScaleOption` should already be hidden, provided that the browser supports that, this patch also prevents it from being accessible via the keyboard.
As far as my testing goes in various browsers, this doesn't seem to have any ill effects, and note that we're already explicitly ignoring the `custom` value in the `select` event handler.

Fixes https://bugzilla.mozilla.org/show_bug.cgi?id=1315608.
2016-11-08 12:04:55 +01:00
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2016-07-17 14:33:41 +02:00
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