[UI] Add missing confirmation modals

[wojcik91]

Description

Add missing modals triggered by actions which require confirmation:

• all the delete operations
• disabling MFA on user list
• disabling MFA in user profile

[Va1ter]

CleanShot.2026-03-17.at.11.22.03.mp4

In the Location Management section, when a location is deleted from the table, a confirmation modal appears. However, if the deletion is performed from within the edit mode, no confirmation modal is shown. This needs to be fixed.

Additionally, after a location is deleted, a black toast notification should be displayed to inform the user that the location has been removed. @filipslezaklab @wojcik91

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from @jakub-tldr: fixed in #2403