ui: adding white full set glyphicons
scheduler + ui: adding cancel and abort task features
ui: typo fix
alert: implemented alert reminders (reminding raised alerts every hour)
ui: clarify button caption
scheduler: added maxqueuedrequests, and task.maxinstancesreached.%!fqtn alert
event: 'requesttask' event now understands taskids local to taskgroup

previously only fqtn were supported, which is less convenient when using
'requesttask' events and taskgroups to set up batch chains