DeskClock: Add increasing volume option for alarm clocks

this commit adds a checkbox preference for "increasing volume" to
alarm clocks. when checked, the alarm will start off at 10% of the
system-wide alarm volume and slowly increase to 100% over the
course of a minute.

Original author for jb is Austen Dicken<cvpcsm@gmail.com>
jb-mr1 porters Davor Bertovic (LorD ClockaN) and maxwen

Change-Id: Ic097e344ed1570602f17f774faed7b612d47be73
DeskClock: the first day of the week depends on a locale

Change-Id: I800bcd16a802540c28303e1b48874e2ead33fd22
Make the settings menu accessible on every tab

Change-Id: Ieb7fdf09e4369701868c52a327aca458c01ed49c