Dialer: Fix Filter/Adjust meanings

http://www.wordreference.com/definition/adjust
1 - to change (something)
So it doesn't make sense to adjust parameters of something that still does
not exist. WWhen the time range is already set, we "adjust" it. But if it
isn't set, we "filter" that time range. Is a meaning thing thought, so I
guess is better to make it clear.

When filter is not set:
http://i.imgur.com/cekOBvr.png
When filter is set:
http://i.imgur.com/pOGKXbD.png

Change-Id: I6068c3542354aa3781e561aa798d56d5fc355027