[FEATURE] ui show exact time, not only "xx days ago"

[fanlix]

Is your feature request related to a problem? Please describe.
From-now relative time is not enough when multi snapshot/backups need a match.
For example some app need 3 backup volumes at same time: db-disk, cache-disk, config-disk

Describe the solution you'd like
show time in exact format, "xxxx-xx-xx hh:mm:ss"

• show it when mouse hover "xx days ago" text
• offer an option to disable from-now time, or another custom column
• show in Volume/backup detail page

Describe alternatives you've considered

Additional context
for current version, the exact time can only be seen in ui:

• Volume - Snapshots and Backups, when mouse hover icons

[PhanLe1010]

Just to confirm. You are referring to the time in this UI page, right?

[yasker]

We can show the exact date/time as a tooltip.

[smallteeths]

Do we want to support a setting item to allow the user to choose the format of the time display. For example type 1 xx ago type 2 xxxx.xxx.xxx. @yasker

[yasker]

@smallteeths Don't need to. I think a tooltip would be enough.

[fanlix]

Just to confirm. You are referring to the time in this UI page, right?

yes, column "Last Backup At" and "Created" of ui page

• Volume
• Backup
• Backup of one volume.

[kaxing]

Validating with latest longhorn mater-head images(longhorn-ui: 6cbf796)

With the new design, now moving mouse cursor over the human-readable time it will show full datetime as tooltips:

[kaxing]

Validation - Passed (master images 2021-08-06)

Any columns with the X time ago will had the datetime tooltips: