Fix #19393 - Add indicator for Refresh list on tokens screen

[darkwing]

Explanation

• Fixes Loading indicator for "Refresh list" button on network selection screen #19393

Clicking "Refresh list" in the token listing provide no feedback to the user that something is happening. This PR shows our current loading indicator to signal to the user that an action is taking place.

Manual Testing Steps

1. Click "Refresh list"
2. See indicator display momentarily
3. See indicator disappear when complete

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 [dc9a180]

• 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 (1939 ± 79 ms)

Platform	Page	Metric	Min (ms)	Max (ms)	Average (ms)	StandardDeviation (ms)	MarginOfError (ms)
Chrome	Home	firstPaint	121	218	160	25	12
		domContentLoaded	1707	2238	1938	165	79
		load	1707	2238	1939	165	79
		domInteractive	1707	2238	1938	165	79

Bundle size diffs

• background: 0 bytes
• ui: 108 bytes
• common: 0 bytes

[codecov]

Codecov Report

Merging #19952 (dc9a180) into develop (13b1f8c) will decrease coverage by 0.01%.
The diff coverage is 22.22%.

@@             Coverage Diff             @@
##           develop   #19952      +/-   ##
===========================================
- Coverage    69.54%   69.53%   -0.01%     
===========================================
  Files          983      983              
  Lines        37161    37167       +6     
  Branches      9963     9963              
===========================================
+ Hits         25841    25842       +1     
- Misses       11320    11325       +5     

Impacted Files	Coverage Δ
ui/store/actions.ts	42.07% <0.00%> (-0.13%)	⬇️
.../multichain/import-token-link/import-token-link.js	94.44% <100.00%> (+0.33%)	⬆️