Reverted the recording timer commit, as it has at least 2 major problems. (1) It...

Reverted the recording timer commit, as it has at least 2 major problems. (1) It uses the user timer, which interferes e.g. with backlight fading on H1x0 (and potentially other targets). Using the user timer here is a waste, as the required timing lies in the range of seconds to days. A tick task would be sufficient. (2) It draws to the LCD from within an ISR. This must not be done unless there's a mechanism to ensure it doesn't interfere with the main thread's drawing, otherwise garbage might be displayed and LCD updates might stop working.

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@10991 a1c6a512-1295-4272-9138-f99709370657