[WebUI] Bug Fixes

[blessedcoolant]

A few bugs fixed.

• After the recent update to the Cancel Button, it was no longer respecting sizing in Floating Mode and the Beta Canvas. Fixed that.
• After the recent dependency update, useHotkeys was bugging out for the fullscreen hotkey f. Realized this was happening because the hotkey was initialized in two places -- in both the gallery and the parameter floating button. Removed it from both those places and moved it to the InvokeTabs component. It makes sense to reside it here because it is a global hotkey.
• Also added index 0 to the default Accordion index in state in order to ensure that the main accordions stay open. Conveniently this works great on all tabs. We have all the primary options in accordions so they stay open. And as for advanced settings, the first one is always Seed which is an important accordion, so it opens up by default.

Think there may be some more bugs. Looking in to them.