MdeModulePkg/DisplayEngineDxe: Support "^" and "V" key on pop-up form

[changab]

Description

BZ #4790 Support "^" and "V" key stokes on the pop-up form. Align the implementation with key support on the regular HII form.

• [ ] Breaking change?
  • Breaking change - Will this cause a break in build or boot behavior?
  • Examples: Add a new library class or move a module to a different repo.
• [ ] Impacts security?
  • Security - Does the change have a direct security impact?
  • Examples: Crypto algorithm change or buffer overflow fix.
• [ ] Includes tests?
  • Tests - Does the change include any explicit test code?
  • Examples: Unit tests or integration tests.

[changab]

@dandanbi , Hi Dandan, do you have a chance to take a look at this PR?

[dandanbi]

Hi @changab, the change looks good to me. Assume you have done the unit test, it should work as expected, right?

[changab]

Hi @changab, the change looks good to me. Assume you have done the unit test, it should work as expected, right?

Right! This fix is verified on AMD platforms.

[changab]

@dandanbi, thank you! :)

[changab]

I rebase the branch to the latest code and will set the push label. Thanks!