[BUGFIX] EM: Update button -> display version

Adds the target version of the extension which
needs an update into the title tag of the update
button.

Releases: 6.0, 6.1
Resolves: #45245
Change-Id: Icd5f98407300abf5759554002c1d42b9214a106c
Reviewed-on: https://review.typo3.org/19631
Reviewed-by: Christian Kuhn
Tested-by: Christian Kuhn
[TASK][EM] More readable "time since last update"-strings

The extensionmanager now shows the time elapsed since the last update,
not the time of the last update. The time of the last update is still
shown in a tooltip. Some english localizations have changed.

Resolves: #46524
Related: #39921
Releases: 6.1, 6.0
Change-Id: I2d5c6e8099e6973826debfcf2cbb597c35bb499c
Reviewed-on: https://review.typo3.org/19617
Reviewed-by: Nicole Cordes
Tested-by: Nicole Cordes
Reviewed-by: Benjamin Mack
Tested-by: Benjamin Mack