Run/fix UI and Server linting

[lresende]

What changes were proposed in this pull request?

Run/fix UI and Server linting

How was this pull request tested?

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[shalberd]

typescript stuff / coding conventions and linting, looking sensible to me.
@caponetto FYI, since I heard you are often involved in frontend stuff :-)

[caponetto]

IMO it'd be better to apply these changes after #3201 gets merged, otherwise we will likely end up with more conflicts to resolve on that PR.

[lresende]

Let's ignore this for now, I believe I have updated my local env and some new dependencies are being installed and causing this, for now let me close this.