custom-selection-added

[anshuman-rai-27]

Fix cBioPortal/cbioportal#11273

Describe changes proposed in this pull request:

• added custom selection text box to take inputs with commas, space or new line or all combined also
• also added examplary placeholder

Checks

• Has tests or has a separate issue that describes the types of test that should be created. If no test is included it should explicitly be mentioned in the PR why there is no test.
• The commit log is comprehensible. It follows 7 rules of great commit messages. For most PRs a single commit should suffice, in some cases multiple topical commits can be useful. During review it is ok to see tiny commits (e.g. Fix reviewer comments), but right before the code gets merged to master or rc branch, any such commits should be squashed since they are useless to the other developers. Definitely avoid merge commits, use rebase instead.
• Is this PR adding logic based on one or more clinical attributes? If yes, please make sure validation for this attribute is also present in the data validation / data loading layers (in backend repo) and documented in File-Formats Clinical data section!

Any screenshots or GIFs?

[netlify]

✅ Deploy Preview for cbioportalfrontend ready!

Name	Link
🔨 Latest commit	c039542
🔍 Latest deploy log	https://app.netlify.com/sites/cbioportalfrontend/deploys/6772b437ca061e000801206a
😎 Deploy Preview	https://deploy-preview-5064.cancerrevue.org
📱 Preview on mobile	Toggle QR Code... Use your smartphone camera to open QR code link.

---

To edit notification comments on pull requests, go to your Netlify site configuration.

[anshuman-rai-27]

@inodb plz review this pr , and suggest the required changes

[inodb]

Thanks so much @anshuman-rai-27 ! Looks great!