Allow filtering by date range on the full-page graph view

[phacks]

When opening a graph in full, we load the results from all the audits from the beginning of the project.

This can be annoying for two reasons:

• It’s slow if my project has several months worth of audits;
• If I want to see the evolution for, say, the last month, and the project is a year old, then I cannot “zoom in” on the dates that I’m interested in.

We can offer two basic “From” “To” selects, and/or usual presets (last week, last month, last 3 months). Would be nice to analyze an example from another website (Google Analytics? NewRelic?) to figure out best practices.