O3-1294:User should be able to navigate back to username screen

[jwnasambu]

Requirements

• This PR has a title that briefly describes the work done, including the ticket number if there is a ticket.

For changes to apps

• My work conforms to the OpenMRS 3.0 Styleguide.

If applicable

• My work includes tests or is validated by existing tests.
• I have updated the esm-framework mock to reflect any API changes I have made.

Summary

A user is able to navigate from the password input screen to the username input screen to modify their username.

Screenshots

screencast.2022-06-03.3.AM-00-47.mp4

Related Issue

Other

[github-actions]

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Error: Error while trying to collect info before merging O3-1294 into master.

TypeError: directoryUrl must be a string or an url, received undefined
    at assertAndNormalizeDirectoryUrl (file:///home/runner/work/openmrs-esm-core/openmrs-esm-core/node_modules/@jsenv/filesystem/src/assertAndNormalizeDirectoryUrl.js:23:11)
    at generateFileSizeReport (file:///home/runner/work/openmrs-esm-core/openmrs-esm-core/node_modules/@jsenv/file-size-impact/src/generateFileSizeReport.js:26:22)
    at file:///home/runner/work/openmrs-esm-core/openmrs-esm-core/tools/size-generator.mjs:41:37

---

_{Generated by @jsenv/file-size-impact during Report bundle size#2453588358 on a420120}

[CynthiaKamau]

LGTM!

[denniskigen]

Nice work, @jwnasambu. I've left a few suggestions.

[denniskigen]

@jwnasambu Please use a different commit message for fixing up the work.