Add voice search button to searchbox

[xmorave2]

This PR adds an voice search button to search form

Does work in Chrome

For Firefox, the use has to set media.webspeech.recognition.enable to true at about:config

This is proof of concept, we probably want it to make it optional for production

[stweil]

(preserve alphabetic sorting)

[stweil]

we probably want it to make it optional for production

Yes, I think an option which enables it would be desired (with default setting = disabled).

[xmorave2]

I made it configurable with disabled by default.

[stweil]

@xmorave2, could you please rebase your commits and fix the merge conflicts?

[xmorave2]

@stweil I have rebased it on current dev branch

[ThoWagen]

This works pretty well!

I wonder if it would be a better user experience if the search directly triggers instead of users having to press the search button afterwards.

[stweil]

I wonder if it would be a better user experience if the search directly triggers instead of users having to press the search button afterwards.

Currently I have to press the microphone button, then speak, then press the search button. For a few short search terms the speech input does not help a lot. This would be different as soon as the search input can be a longer free text which is handled by an AI search.

[stweil]

I still struggle with the configuration. Setting enableVoiceSearch = true had no effect, so I had to manipulate searchbox.phtml to see the feature in Chrome.