Remove Drop Down from combo box name as it is redundant

[mykhailopylyp]

Summary of the Pull Request

What is this about?
Remove redundant part from a Combobox name.

PR Checklist

• Applies to [Programmatic Issue: Settings>Remap key>Add button]: Name of both 'Key dropdown 1' combo box is incorrectly defined in code. #7088
• CLA signed. If not, go over here and sign the CLA
• Tests added/passed
• Requires documentation to be updated
• I've discussed this with core contributors already. If not checked, I'm ready to accept this work might be rejected in favor of a different grand plan. Issue number where discussion took place: #xxx

Info on Pull Request

Validation Steps Performed

How does someone test & validate?
Check with the Narrator if combobox in Remap keys/Remap shortcuts windows have correct names that is they should not contain redundant Drop Down. As an alternative Accessibility Insight can be used.

[htcfreek]

@mykhailopylyp
In the issue under expected behaviour is described that also "the header label should be associated with" the combo box. Is this done in another PR?

[mykhailopylyp]

@htcfreek
Good point! I did not implement that as when a user navigates to the first control of a cell they get to know that they are in Key or Mapped To column. Let's discuss it in the issue.