[Remove Vuetify from Studio] Upload in progress and Save failed dialogs #5422

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Sub-issue of #5060.

Complexity: Low

Summary

Migrate the following two dialogs in Edit resource from Vuetify to Kolibri Design System.

MessageDialog built with several Vuetify components is currently used to show them. To remove this Vuetify dependency, replace the usage of MessageDialog in these specific locations with KModal. Ensure that dialogs work exactly as before. Do not refactor any other areas.

How to get there

• Login as a@a.com with password a
• Go to Channels > Published Channel
• Select Sample video
• In code, temporarily change promptUploading and promptFailed to true

Guidance

• Find detailed guidance with many code examples in KDS documentation
• Read the project for more useful references

Out of Scope

• Do not refactor any other areas of the codebase

Expected UI/UX changes

• Minor visual differences naturally stemming from the use of KDS

Acceptance criteria

General

• The specification above is followed.
• Except for "Expected UI/UX changes," there are no functional or visual differences in user experience.
• All user interactions are manually tested with no regressions.
• Pull request includes screenshots.

a11y and i18n

See the project's "Guidance" for useful references.

• Implementation meets a11y standards
• All components are LTR and RTL compliant (preview with pnpm run devserver since :hot doesn't render RTL properly)
• All user-facing strings are translated properly
• The notranslate class been added to elements that shouldn't be translated by Google Chrome's automatic translation feature (e.g. user-generated text)
• Mobile experience is reasonable

Unit tests

• If there is a unit test suite already, it is meaningfully updated (even if tests don't fail)
• If there is no unit test suite, a new one is created. Do not use obsolete @vue/test-utils approach. Instead, use @testing-library/vue (Vue Testing Library).