Revert "Bug #683867 - Schedule actions with higher idle priority"

Revert "Bug #683867 - Schedule actions with higher idle priority"

This reverts commit 224e8bed43ea13e34adbeef786a0d60f848bb170.

The commit contains not a single comment as to why these custom priority
values are being used.  The rationale needs to be documented in the code,
either at each call point or preferably at a centralized priority value
definition.