Revert "applets/taskmanager: simplify right press handling"

This reverts commit f2160c3b.

Apparently in some hardware the clock is not reliable so in two adjacent
event loops the timer often gets the same time point, which prevents the
long pressed timer from being activated before the release event.

BUG: 482813
FIXED-IN: 6.0.4


(cherry picked from commit c9ae061d)