There was a question about "how to improve the datetime display for
SSH/PGP/WebAuthn"
https://github.com/go-gitea/gitea/pull/28262#issuecomment-1831141611
The root problem is that `DateTime` misses the "data-tooltip-content"
attribute, which should be used to make the tooltip popup smoothly.
Now the UI is consistent and the end users could see the detailed
hour/minute/second easily by hovering the element.


- Resolves https://github.com/go-gitea/gitea/issues/22493
- Related to https://github.com/go-gitea/gitea/issues/4520
Some admins prefer all timestamps to display the full date instead of
relative time. They can do that now by setting
```ini
[ui]
PREFERRED_TIMESTAMP_TENSE = absolute
```
This setting is set to `mixed` by default, allowing dates to render as
"5 hours ago". Here are some screenshots of the UI with this setting set
to `absolute`:



---------
Signed-off-by: Yarden Shoham <git@yardenshoham.com>
Co-authored-by: delvh <dev.lh@web.de>
This refactors the `shared/datetime/short|long|full` templates into a
template helper function, which allows us to render absolute date times
within translatable phrases.
- Follows #23988
- The first attempt was in #24055
- This should help #22664
Changes:
1. Added the `DateTime` template helper that replaces the
`shared/datetime/short|long|full` templates
2. Used find-and-replace with varying regexes to replace the templates
from step 1 (for example, `\{\{template "shared/datetime/(\S+) \(dict
"Datetime" ([^"]+) "Fallback" ([^\)]+\)?) ?\)?\}\}` -> `{{DateTime "$1
$2 $3}}`)
3. Used the new `DateTime` helper in the issue due date timestamp
rendering
# Before

# After

---------
Signed-off-by: Yarden Shoham <git@yardenshoham.com>
Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>