Superset i18n: redirect back to previous page after changing language setting

[pomegranited]

Description

The original issue states:

When changing the language, Superset redirects the user to the homepage, regardless of the current page. Although I understand that a restart might be necessary for language changes to take effect, it would be more user-friendly if the user remained on the page they were working on after the restart.

However there seems to be a "previous page" stored in the user's session somewhere, because after visiting the User Info page (/users/userinfo/), this became my go-to page instead of the home page for redirects after changing my language.

Supporting Information

• Part 3 of Issues with Language Settings in Superset: Configuration Not Saved, Partial Translations, and Redirects apache/superset#30334
• Also reported here: Redirect happens whenever user changes language apache/superset#12768

Proposed solution

Investigate further, and choose an appropriate option.

Option 1: Fix "previous page" setting

• Determine where the "previous page" setting is stored and updated in the user's session
• Ensure this setting gets updated whenever the "current page" changes.

Option 2: Store "next page" as URL param on language change

• As with the "login" screen, store the "current page" path as a next URL parameter when changing the user's preferred language
• Ensure this next parameter is used when deciding where to redirect after changing the user's preferred language.

Aspects specifics

• Ensure the solution is backported to the Superset version used by Aspects.

[bmtcril]

Just noting that this is an upstream Superset enhancement, but is an improvement we want for Aspects.