frontend: resourceMap: Unify network icon with sidebar

[blazethunderstorm]

Summary

This PR fixes an icon inconsistency for the "Network" section by updating the icon used in the resource map filter to match the one used in the sidebar.

Related Issue

Fixes #3485

Changes

• Updated the icon for the "Network" group in GraphSources.tsx

• Replaced mdi:lan with mdi:folder-network-online for visual consistency

Steps to Test

1. Start Headlamp locally

2. Navigate to the Resource Map

3. Confirm that the Network icon in the sidebar and map filter now match visually

Screenshot

[k8s-ci-robot]

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[blazethunderstorm]

@illume pls review

[skoeva]

Thanks for taking a look, a couple of things:

• Have you tested this change / could you provide a screenshot of the fix in your PR? This is what I see on my end:

• Could you change the PR/commit title to the following format: <area>: <description of changes>

[blazethunderstorm]

now its visible

[skoeva]

Thanks! Can you now squash your changes and change the PR & commit titles as described?

For example, the title can be frontend: resourceMap: Unify network icon with sidebar

[blazethunderstorm]

@skoeva sure , thanks for your review

[blazethunderstorm]

@skoeva cant the commits be sqaushed while merging ?

[blazethunderstorm]

i am facing a bit of problem at my end

[skoeva]

See this comment: #3595 (comment)