Add an ignored option given to graphite
Compute an explanation of the period on the fly

In the edit page of a check (threshold or predictive) a function javascript
displays a sentence explaning the effective period of when the check will
be applied.
Add link to switch between edit and view for check
Patch for the mail sent by the check view

The subject is prefilled by the name of the check
The user who send the mail is added in the recipient list even if he isn't in
the list of the users who subscribe to this check.
Zoom on a graph by selecting a period on it

On the dashboard view, the user can select a period on a graph,
the graph will be refreshed and this zoom will be applied to all the
other graphs.
A little jquery modification
CSS class modification