The checkbox only toggled a CSS class for rows labelled "All the same or
non-existent", while `hideNotApplicable`, which filters the offered
devices by whether their copy can be applied, was hard-coded to false.
Items present on another device therefore stayed visible even when every
copy was the same.
Drive `hideNotApplicable` from the checkbox, so the comparison only runs
while it is on, and pass it to the reactive update so toggling it
re-evaluates the rows. The term selection moves into PluginTerms.ts so it
can be unit-tested.
Fixes#1193
PluginDataExDisplayV2.mtime applied `~~` to the sum of millisecond
timestamps before dividing, which keeps only the low 32 bits. The
freshness chip and "Select All Shiny" then compared wrapped values and
could offer an older copy as newer.
Fixes#1194
Immick