sap.m.SelectDialog: Allow clear in single selection mode

[zypA13510]

The clear button will always be enabled, if showClearButton=true and multiSelect=false.
The clear button behavior is redefined to act as clear+confirm in single selection mode.

This closes #2379. This will provide a workaround for #898.

P.S. I'm not sure if this should count as a [FIX] or a [FEATURE], so it's not included in any title.

[stoyanovski]

Hi @zypA13510,

Thank you for your contribution. I created internal incident regarding your pull-request. The colleagues from the corresponding team will check if it's relevant for their control.

Best Regards,
Oliver

[niyap]

Hello @zypA13510 ,

As is described in your related incident: #2379
We will analyze and evaluate all possible interactions and then we will make the decision.

Thank you for your contribution. Your proposal(pull request) will be evaluated as well.
We will keep you in touch regarding the progress and our final decision.
For this reason, we are currently not able to approve your pull request.

Thanks again for your proactivity and contribution!

Regards,
Niya

[zypA13510]

Actually, this was submitted prior to the reply in 2379 (but probably not being tracked for some reasons?)

[Shtilianova]

Internal record is 1980259563. The status of the issue will be updated here in GitHub.

[CLAassistant]

All committers have signed the CLA.

[flovogt]

This PR will be covered in backlog item FIORIDESIGN-614