ui: typo fix
ui: adding alerts-related tasks view on alerts page
ui: instances count on resources page
ui: added global status and global buttons
ui: added raise and emit alert buttons/forms
alert: graceperiodbeforefirstsend is now configurable, default to 60"

formerly it was a hard coded 10"
alert: adding several headers to e-mail alerts, including To:
alert: setting graceperiodbeforefirstsend default value to 30"

instead of 60"
alert: MailSender uses QHash for headers, no longer QMap
alert+config: + "onconfigload" event, - "scheduler.start" implicit alert
config: min/maxexpecteduration are exprimed in seconds in config

like any other time specification, seconds are used in config and
display, milliseconds are used in API
ui: adding anchors in tasks views and link from schedule to config

this implied to switch bootstrap navbar style from 'fixed' to 'static'
since displaying #anchor urls with a static navbar is quite painful