Fix #19832 - UX: Multichain: Move location of test networks

[darkwing]

Explanation

It was pointed out by @SaraCheikh that the test networks need to display under the toggle, not with the rest of the networks

• Fixes [Bug]: UX: Multichain Network Menu: Move location of test networks #19832

ToDo

• Add a dozen accounts and ensure the modal still looks good in popup (doesn't require the user to scroll through the entire popup).

Screenshots/Screencaps

Manual Testing Steps

1. Open the network menu
2. Toggle on and off the "Show Test Networks" toggle

Pre-merge author checklist

• I've clearly explained:
  • What problem this PR is solving
  • How this problem was solved
  • How reviewers can test my changes
• Sufficient automated test coverage has been added

Pre-merge reviewer checklist

• Manual testing (e.g. pull and build branch, run in browser, test code being changed)
• PR is linked to the appropriate GitHub issue
• IF this PR fixes a bug in the release milestone, add this PR to the release milestone

If further QA is required (e.g. new feature, complex testing steps, large refactor), add the Extension QA Board label.

In this case, a QA Engineer approval will be be required.

[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 [25bc7bd]

• builds: chrome, firefox
• builds (beta): chrome
• builds (flask): chrome, firefox
• build viz: Build System
• mv3: Background Module Init Stats
• mv3: UI Init Stats
• mv3: Module Load Stats
• 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
  • common: 0, 1, 2, 3, 4, 5
  • content-script: 0
  • contentscript: contentscript
  • disable-console: disable-console
  • inpage: inpage
  • policy-load: policy-load
  • sentry-install: sentry-install
  • ui: 0, 1, 10, 11, 12, 2, 3, 4, 5, 6, 7, 8, 9

Page Load Metrics (1622 ± 39 ms)

Platform	Page	Metric	Min (ms)	Max (ms)	Average (ms)	StandardDeviation (ms)	MarginOfError (ms)
Chrome	Home	firstPaint	102	190	133	19	9
		domContentLoaded	1454	1747	1622	81	39
		load	1454	1747	1622	81	39
		domInteractive	1454	1747	1622	81	39

Bundle size diffs

• background: 0 bytes
• ui: -213 bytes
• common: 0 bytes

[codecov]

Codecov Report

Merging #19812 (a678617) into develop (230c0c6) will increase coverage by 0.00%.
The diff coverage is 80.56%.

@@           Coverage Diff            @@
##           develop   #19812   +/-   ##
========================================
  Coverage    69.84%   69.84%           
========================================
  Files          981      981           
  Lines        36941    36939    -2     
  Branches      9913     9911    -2     
========================================
- Hits         25799    25798    -1     
+ Misses       11142    11141    -1     

Impacted Files	Coverage Δ
.../multichain/network-list-menu/network-list-menu.js	69.09% <73.08%> (-0.91%)	⬇️
ui/selectors/selectors.js	86.81% <100.00%> (+0.07%)	⬆️

[metamaskbot]

Builds ready [a678617]

• builds: chrome, firefox
• builds (beta): chrome
• builds (flask): chrome, firefox
• build viz: Build System
• mv3: Background Module Init Stats
• mv3: UI Init Stats
• mv3: Module Load Stats
• 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
  • common: 0, 1, 2, 3, 4, 5
  • content-script: 0
  • contentscript: contentscript
  • disable-console: disable-console
  • inpage: inpage
  • policy-load: policy-load
  • sentry-install: sentry-install
  • ui: 0, 1, 10, 11, 12, 2, 3, 4, 5, 6, 7, 8, 9

Page Load Metrics (1794 ± 66 ms)

Platform	Page	Metric	Min (ms)	Max (ms)	Average (ms)	StandardDeviation (ms)	MarginOfError (ms)
Chrome	Home	firstPaint	106	192	155	27	13
		domContentLoaded	1585	2120	1794	136	65
		load	1585	2120	1794	136	66
		domInteractive	1585	2120	1794	136	65

Bundle size diffs

• background: 0 bytes
• ui: 80 bytes
• common: 0 bytes