Notifications about favourites and follows use .notification-right,
notifications about replies instead use .heading-right.
Previously only the former set a min-width, however the
chosen value of 3em was too small to fit the worst case.
As a consequence, when the timestamp text changes over time,
its element width changes, which may result in neighbouring text
(no longer) needing to wrap to a new line in turn changing the size
of the whole notification box pushing older notification boxes down/up.
These constant movements at the side of the screen can be quite
annoying and confusing when the cause cannot be immediately discerned.
Avoid this, by reserving enough space for any timestamp.
For English, the worst case is the five-character 'XXmin', since the
short identifier for minutes is the longest with three letters.
With two exceptions, all other current localisation also do not exceed
three letters in any short unit identifier up to days.
However, some localisations (e.g. Polish) additionally insert a space
between numerical value and unit. This matches SI recommendations
pushing the worst case to 6 characters.
6 characters will be sufficient for timestamps up to 3 weeks in all
languages (minus prev exceptions), which seems reasonable enough
as beyond this timestamps rarely change anyway.
The aforementioned exceptions being Vietnamese and Occitan,
but in the current localisation all or the relevant short unit
identifiers are identical to the long forms indicating this is
just due to incomplete translation.
Indeed, Vietnamese Wikipedia (read through machine translation) suggests
“ph” is commonly used as unit identifiers for minutes, but the current
localisation fully spells it out as “phút”.
Currently all notifications except follow-related once include
and explicit direction text. (It missing in follow notifs is due to an
omission in 804ba0cdb6 which only added
the newly introduced with-direction to status-related notifs. Before,
presumably all notifs included direction text.)
But in the notification tray horizontal space is scarce
and notifs can already be assumed to only come from the past.
While it might not be too bad for the English localisation’s 4-letter
' ago' suffix, e.g. the Indonesian localisation’s ' yang lalu' needs
10 letters.
Thus instead of fixing the omission for follow-related notifs,
drop direction text from all notification timestamps.
