Shortcut Page and Floating Button

[mukul-mehta]

• Use the shortcutHandler hook to allow changing shortcuts
• Update shortcuts used to use this hook instead of the callback inside of tinykeys directly
• Add a shortcuts page and allow users to modify shortcuts
• Add Floating Button for help on bottom right
• Add About section to the settings page

[linear]

WD-1303 [FEATURE] Shortcut Page and Floating Help Button

Is your feature request related to a problem or an improvement? Please describe.

Add shortcut handler, shortcuts page and the floating button to webapp

[sahil-shubham]

Need to persist shortcut store, currently gives this error on persisting from idb:

    Uncaught TypeError: get(...).modifiers.has is not a function

EDIT: I am stupid. Shortcuts are now persisted.