kuma-gui: new build for v0.4.0 release

[bloqhead]

Summary

This release covers some bugfixes and overall UX improvements to the data overview component that is used heavily throughout the GUI. This release tightens up the overall experience with the table and detail views, and improves the refresh and data loading functionalities.

Full changelog

• [#8] Improved the evaluation function that handles the Total Updates calculations
• [#9] Overhauled the DataOverview component that handles all of the Policy and Entity overviews (all pages). The data loading experience is now more consistent and helps ensure that things go smoothly when working with multiple entities
  • Improved the refresh function. Added a spinning icon to show when the data is refreshing, and disabled the button until the process is finished so that it can't accidentally be pressed multiple times
  • Fixed an issue where the refresh button wasn't working on all data overviews and would hang
• [#10] New styles for tags on the Dataplanes overview
  • Tags are now styled to give a clear idea of tag labels and values. This helps with readability when a dataplane has multiple tags applied to it.
• [#12] New TrafficTrace entity detail and list views (thank you, @jakubdyszkiewicz!)

[bloqhead]

@yskopets @jakubdyszkiewicz please advise on the best way to add my changes to the changelog.

[yskopets]

@bloqhead I think, we can add 4 separate entries into the CHANGELOG and just link them to the same PR (this one).