Added Combo box and Rich text editor

[BCBuizer]

Added Combo box and Rich text editor to the relevant core properties that apply to them.

[learn-build-service-prod]

Learn Build status updates of commit 48ffba1:

⚠️ Validation status: warnings

File	Status	Preview URL	Details
powerapps-docs/maker/canvas-apps/controls/properties-core.md	⚠️Warning		Details

powerapps-docs/maker/canvas-apps/controls/properties-core.md

• Line 33, Column 251: [Warning: file-not-found - See documentation] Invalid file link: 'control-combobox.md'.
• Line 37, Column 66: [Warning: file-not-found - See documentation] Invalid file link: 'control-combobox.md'.
• Line 41, Column 59: [Warning: file-not-found - See documentation] Invalid file link: 'control-combobox.md'.
• Line 45, Column 214: [Warning: file-not-found - See documentation] Invalid file link: 'control-combobox.md'.
• Line 49, Column 92: [Warning: file-not-found - See documentation] Invalid file link: 'control-combobox.md'.
• Line 57, Column 158: [Warning: file-not-found - See documentation] Invalid file link: 'control-combobox.md'.
• Line 65, Column 280: [Warning: file-not-found - See documentation] Invalid file link: 'control-combobox.md'.

For more details, please refer to the build report.

Note: Your PR may contain errors or warnings or suggestions unrelated to the files you changed. This happens when external dependencies like GitHub alias, Microsoft alias, cross repo links are updated. Please use these instructions to resolve them.

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[learn-build-service-prod]

Learn Build status updates of commit e185e8a:

✅ Validation status: passed

File	Status	Preview URL	Details
powerapps-docs/maker/canvas-apps/controls/properties-core.md	✅Succeeded

For more details, please refer to the build report.

For any questions, please:

• Try searching the learn.microsoft.com contributor guides
• Post your question in the Learn support channel

[learn-build-service-prod]

Learn Build status updates of commit efac396:

✅ Validation status: passed

File	Status	Preview URL	Details
powerapps-docs/maker/canvas-apps/controls/properties-core.md	✅Succeeded

For more details, please refer to the build report.

For any questions, please:

• Try searching the learn.microsoft.com contributor guides
• Post your question in the Learn support channel

[learn-build-service-prod]

Learn Build status updates of commit 6a65cae:

✅ Validation status: passed

File	Status	Preview URL	Details
powerapps-docs/maker/canvas-apps/controls/properties-core.md	✅Succeeded

For more details, please refer to the build report.

For any questions, please:

• Try searching the learn.microsoft.com contributor guides
• Post your question in the Learn support channel

[learn-build-service-prod]

Learn Build status updates of commit 97bfe7a:

✅ Validation status: passed

File	Status	Preview URL	Details
powerapps-docs/maker/canvas-apps/controls/properties-core.md	✅Succeeded

For more details, please refer to the build report.

For any questions, please:

• Try searching the learn.microsoft.com contributor guides
• Post your question in the Learn support channel