5.4.0-prerelease - Import rename input does autosave now

[XLBilly]

Regression: Buttons in rename dialog are disappeared:

v5.3.8:

v5.4.0:

Tested on https://tiddlywiki.com/prerelease/empty.html

[saqimtiaz]

@XLBilly this change is intentional and was made due to frequent feedback that users would forget to confirm the rename.The new name is now applied without needing to confirm it via a button.