[6.x] fix: custom oauth prompt callback registration (#398)

[6.x] Allow custom OAuth prompts (#397)

[6.x] (deps): drop paragonie/constant_time_encoding (#395)

[6.x] Fix Breeze React ts files (#393)

[5.x] confirm account link for logged in users (#391)

Merge commit from fork

[6.x] fix auth redirects (#387)

[6.x] fix auth pipeline when not using fortify (#386)

[6.x] retrieve the model to allow deletion to fire model events (#381)

[6.x] fix auth when using a custom authentication pipeline in Fortify (…

…#379)