[$40][MSFT-212] User can't focus on the the 'Sort by' using tab

[veshu]

Steps to Reproduce

1. Go to https://www.topcoder.com/challenges?bucket=my
2. Press tab key till the 'Sort by' are selected

Expected Result
User should be able to select the 'Sort by' using tab

Actual Result
User can't focus on the 'Sort by' using tab

Device: Desktop/Labtop
Operating System: Windows
Browser: Chrome

WCAG Category: 2. Operable
WCAG Level: A
WCAG Success Criterion: 2.1.1 Keyboard
Screen Reader Used: N/A
Accessibility Audit Tool used: N/A

Attachment
https://topcodermsft-my.sharepoint.com/personal/pd-topcoder_topcodermsft_onmicrosoft_com/Documents/Forms/All.aspx?cid=b9c070b1%2Dbb96%2D40e1%2Db92f%2D16f47db5d911&FolderCTID=0x0120005C598A51049FC14CBA882E1AEE168F51&id=%2Fpersonal%2Fpd%2Dtopcoder%5Ftopcodermsft%5Fonmicrosoft%5Fcom%2FDocuments%2FMSFT%2DTeams%2DQA%2FJune%202019%2F29%20Jun%2FTest%20Results%2FBug%20Videos%20%26%20Log%20Files%2Fdoremihong%2FTest%20for%20Accessibility%20Challenge%2FBug%5F21

[ThomasKranitsas]

[504]: Failed to create challenge.

This is an automated message for thomaskranitsas via Topcoder X

[ThomasKranitsas]

[504]: Failed to create challenge.

This is an automated message for thomaskranitsas via Topcoder X

[ThomasKranitsas]

Contest https://www.topcoder.com/challenges/30095964 has been created for this ticket.

This is an automated message for thomaskranitsas via Topcoder X

[ThomasKranitsas]

Contest https://www.topcoder.com/challenges/30095964 has been updated - the new changes has been updated for this ticket.

This is an automated message for thomaskranitsas via Topcoder X

[cwdcwd]

Contest https://www.topcoder.com/challenges/30095964 has been updated - it has been assigned to PkDurlabhji.

This is an automated message for lazybaer via Topcoder X

[PrakashDurlabhji]

@veshu PR #2930