Merge in a new tab new MBS feature makes my buttons disappear

[jesus2099]

These buttons are not showing anymore:

• mb_HIDE-DIGITAL-RELEASES View/Hide download releases 0689bb2
• mb_MERGE-HELPOR-2 Restore Empty queue and merge #899

[jesus2099]

The buttons are removed by react-hydrate new hint: custom mb-hydration event

Maybe I save them in variables and regularly poll the variables, and when they're nullified, I recreate them?

Or maybe they lose their parent and then I just have to insert them back in the DOM.

[jesus2099]

Show/hide the DL releases fixed.
Splitting Empty queue and merge buttons fix: #899