* fix(UI): Correctly compute downtime start/end date/time & duration

* fix(UI): Keep current timepicker value

* update licenses

* enh check on refresh param

* sanitizing http params

Refs: MON-4447

Refs: MON-4059

* fix export when filtering on hostrgoup

* fix copyright year
* normilizes code and fix some PSR-2
* small fix PSR-2

* fix(datepicker): change end date when start date is set after it, remove duplicated JS

* Update index.php
* Update table.ihtml

enh(description): Improve description

* enh(widgets): use localStorage to keep checked checkboxes during refresh

* enh(widget): enhance variable scope

* fix(indentation): fix coding style

* enh(widget): add comment about localStorage key

* enh(widgets): user var for local scope variables

The downtime popup does not close when we click on the 'Set Downtime' button.

Modified how to calculate the total number of lines

* fix(front): resize properly widget after data load

Refs: #76

* fix(front): adapt widget height with horizontal scrollbar