[Rollups] Day selector should take in account the dateFormat:dow advanced setting

[marius-dr]

Kibana version: master

Browser version: All

Original install method (e.g. download page, yum, from source, etc.): source

Describe the bug:
In the day of the week selector for the Schedule, the list starts with Sunday, regardless of the setting done in the advanced settings which sets what day should weeks start on.

Expected behavior:
Changing the start day of the week should offset the list in the rollup scheduler page.

Screenshots (if relevant):

I understand that the setting is generally used by ES for week aggregations, but since it's already exposed to the user, he will expect his regional setting to be used across the board.