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

Avoid messages "Ip address not defined for poller" in centcore.log

fix(ACL): Fix ACL actions