fix(snaps): Scrollbar being partially hidden behind footer

[GuillaumeRx]

Description

This fixes the scrollbar in Snap dialogs being partially hidden behind the footer.

Related issues

Fixes:

Manual testing steps

Screenshots/Recordings

Before

After

Pre-merge author checklist

• I've followed MetaMask Contributor Docs and MetaMask Extension Coding Standards.
• I've completed the PR template to the best of my ability
• I’ve included tests if applicable
• I’ve documented my code using JSDoc format if applicable
• I’ve applied the right labels on the PR (see labeling guidelines). Not required for external contributors.

Pre-merge reviewer checklist

• I've manually tested the PR (e.g. pull and build branch, run the app, test code being changed).
• I confirm that this PR addresses all acceptance criteria described in the ticket it closes and includes the necessary testing evidence such as recordings and or screenshots.

[github-actions]

CLA Signature Action: All authors have signed the CLA. You may need to manually re-run the blocking PR check if it doesn't pass in a few minutes.

[metamaskbot]

Builds ready [5fcea01]

• builds: chrome, firefox
• builds (beta): chrome
• builds (flask): chrome, firefox
• builds (MMI): chrome, firefox
• builds (test): chrome, firefox
• builds (test-flask): chrome, firefox
• build viz: Build System
• mv3: Bundle Size Stats
• mv2: E2e Actions Stats
• code coverage: Report
• storybook: Storybook
• typescript migration: Dashboard
• all artifacts
• bundle viz:

  • background: 0, 1, 2, 3, 4, 5, 6, 7
  • common: 0, 1, 10, 11, 12, 2, 3, 4, 5, 6, 7, 8, 9
  • content-script: 0
  • offscreen: 0
  • ui: 0, 1, 10, 11, 12, 13, 2, 3, 4, 5, 6, 7, 8, 9

Page Load Metrics (1529 ± 49 ms)

Platform	Page	Metric	Min (ms)	Max (ms)	Average (ms)	StandardDeviation (ms)	MarginOfError (ms)
Chrome	Home	firstPaint	1351	1742	1537	103	49
		domContentLoaded	1339	1727	1516	98	47
		load	1348	1740	1529	102	49
		domInteractive	21	77	38	19	9
		backgroundConnect	9	61	16	12	6
		firstReactRender	15	72	35	22	11
		getState	4	53	14	16	8
		initialActions	0	1	0	0	0
		loadScripts	963	1338	1121	84	40
		setupStore	6	44	9	8	4
		uiStartup	1549	1990	1734	103	50

[metamaskbot]

Builds ready [ca89e23]

• builds: chrome, firefox
• builds (beta): chrome
• builds (flask): chrome, firefox
• builds (MMI): chrome, firefox
• builds (test): chrome, firefox
• builds (test-flask): chrome, firefox
• build viz: Build System
• mv3: Bundle Size Stats
• mv2: E2e Actions Stats
• code coverage: Report
• storybook: Storybook
• typescript migration: Dashboard
• all artifacts
• bundle viz:

  • background: 0, 1, 2, 3, 4, 5, 6, 7
  • common: 0, 1, 10, 11, 12, 2, 3, 4, 5, 6, 7, 8, 9
  • content-script: 0
  • offscreen: 0
  • ui: 0, 1, 10, 11, 12, 13, 2, 3, 4, 5, 6, 7, 8, 9

Page Load Metrics (1572 ± 34 ms)

Platform	Page	Metric	Min (ms)	Max (ms)	Average (ms)	StandardDeviation (ms)	MarginOfError (ms)
Chrome	Home	firstPaint	308	1747	1525	288	138
		domContentLoaded	1447	1701	1552	63	30
		load	1463	1705	1572	72	34
		domInteractive	24	75	45	20	10
		backgroundConnect	7	78	22	18	9
		firstReactRender	15	101	34	28	13
		getState	4	64	19	19	9
		initialActions	0	1	0	0	0
		loadScripts	1046	1323	1169	61	29
		setupStore	6	62	17	19	9
		uiStartup	1622	2206	1831	141	68

[metamaskbot]

Builds ready [ec5f66f]

• builds: chrome, firefox
• builds (beta): chrome
• builds (flask): chrome, firefox
• builds (MMI): chrome, firefox
• builds (test): chrome, firefox
• builds (test-flask): chrome, firefox
• build viz: Build System
• mv3: Bundle Size Stats
• mv2: E2e Actions Stats
• storybook: Storybook
• typescript migration: Dashboard
• all artifacts
• bundle viz:

  • background: 0, 1, 2, 3, 4, 5, 6, 7
  • common: 0, 1, 10, 11, 12, 2, 3, 4, 5, 6, 7, 8, 9
  • content-script: 0
  • offscreen: 0
  • ui: 0, 1, 10, 11, 12, 13, 2, 3, 4, 5, 6, 7, 8, 9

Page Load Metrics (1650 ± 48 ms)

Platform	Page	Metric	Min (ms)	Max (ms)	Average (ms)	StandardDeviation (ms)	MarginOfError (ms)
Chrome	Home	firstPaint	1456	1827	1658	98	47
		domContentLoaded	1404	1793	1626	101	49
		load	1448	1827	1650	100	48
		domInteractive	23	119	41	24	12
		backgroundConnect	9	54	27	14	7
		firstReactRender	15	82	40	25	12
		getState	5	50	14	12	6
		initialActions	0	1	0	0	0
		loadScripts	1029	1348	1212	82	39
		setupStore	6	62	17	19	9
		uiStartup	1636	2035	1871	123	59