Delete legacy mobile UI - Fixes #2557

[lindapaiste]

Fixes #2557
Progress on #2555

This will clear up a lot of developer confusion and ensure that what contributors see on localhost matches what we are using in production.

Changes:

• Delete MOBILE_ENABLED feature flag from .env as the new responsive design is always enabled.
• Delete mobileFirst HOC which was previously used to show the experimental mobile design on localhost when the MOBILE_ENABLED flag was set.
• Delete component-switching via mobileFirst from the app routing.
• Delete the components MobileIDEView etc. which are no longer used anywhere.
• Delete elemental UI components (ActionStrip, etc.) which were only used in those views.
• Moved remained component IconButton to the /common folder and deleted the client/components/mobile folder.

I have verified that this pull request:

• has no linting errors (npm run lint)
• has no test errors (npm run test)
• is from a uniquely-named feature branch and is up to date with the develop branch.
• is descriptively named and links to an issue number, i.e. Fixes #123

[PiyushChandra17]

Nicely Done.

[raclim]

Thanks for working on this! Glad to see some of the errors that were starting to pop up from the legacy components resolved!

I'm wondering if you think if the files within the components/mobile folder should be deleted here too?

[lindapaiste]

I'm wondering if you think if the files within the components/mobile folder should be deleted here too?

I’ll take a look. I think IconButton is the only one still in use. We can move that to a different folder.

[raclim]

Just did a check as well and think you're right! I think deleting that file and moving the IconButton would be great here, but also could merge in this PR as is!

[lindapaiste]

Just did a check as well and think you're right! I think deleting that file and moving the IconButton would be great here, but also could merge in this PR as is!

I just deleted those files. 🪓

Next up...we need to delete the translations for the components that we deleted, but I want to give that a closer look because some of those phrases we may want to move rather than delete ("My Stuff" is one). There's a few places in the new code where phrases are not translated. //TODO

[raclim]

This is great, thanks so much again for cleaning this up!