[SwipeableDrawer] disableDiscovery on a swipeable edge drawer has inverted effect.

[tech-meppem]

Duplicates

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Latest version

• I have tested the latest version

Current behavior 😯

This only has a noticeable effect if the drawer has a swipeable edge (Docs).
Leaving "disableDiscovery" as false means that when you hold click on the drawer (requires mobile touch emulation for touchstart), the drawer pops up a bit, which is correct.
Setting "disableDiscovery" to true, however, means that the drawer dips down a bit when you start holding the drawer, instead of staying still.
GIF showcase: https://imgur.com/a/q4MNvG6

Expected behavior 🤔

Setting "disableDiscovery" to true should mean that the drawer should not move until the user starts to drag the drawer.

Steps to reproduce 🕹

Steps:
Requires mobile touch emulation (can just use chrome / firefox mobile mode in dev tools)

1. Use codesandbox demo from: https://mui.com/components/drawers/#swipeable-edge
2. Add "disableDiscovery={true}" to the SwipeableDrawer component
3. Click on drawer, and it dips down.

Context 🔦

I'm trying to get the drawer not to move, until the user starts moving.

I have tracked the cause to this line in SwipeableDrawer.js:
(disableDiscovery ? 15 : -DRAG_STARTED_SIGNAL),
This means that when disableDiscovery is true, the drawer dips down 15px on touchstart.

I assume it's 15 due to reasons related for when a drawer doesn't have a swipeable edge. I think this should just be a prop, something like "discoverAmount", where you can set the DRAG_STARTED_SIGNAL to a number for both up and down sides, or [number,number] for separate up and down amounts.

Your environment 🌎

`npx @mui/envinfo`

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