WIP TW-849: select text in message bubble web

[imGok]

Remove select on tap on web and long press

#849

issues:

• Selectable texts in flutter web is not working wel and interfers with other gestures like dropzone buttons etc.
• sometimes I cannot select text even if I use SelectableText, SelectionArea, SelectableRegion none of them works (for cleanrichtext especially)
• sometimes I activate the drag & drop feature even If I have nothing selected
• selection features such as double tap to select etc doesn't work in Flutter web, it's not like HTML
• selection works well with simple text such as display name etc (SelectableText)

refs: https://api.flutter.dev/flutter/material/SelectionArea-class.html

[github-actions]

This PR has been deployed to https://linagora.github.io/twake-on-matrix/855

[sherlockvn]

Remove select on tap on web and long press

#849

issues:

• Selectable texts in flutter web is not working wel and interfers with other gestures like dropzone buttons etc.
• sometimes I cannot select text even if I use SelectableText, SelectionArea, SelectableRegion none of them works (for cleanrichtext especially)
• sometimes I activate the drag & drop feature even If I have nothing selected
• selection features such as double tap to select etc doesn't work in Flutter web, it's not like HTML
• selection works well with simple text such as display name etc (SelectableText)

refs: https://api.flutter.dev/flutter/material/SelectionArea-class.html

I have checked the web again and found several issues:

• When user tap to other places like composer, the selected text is blink.
• The copy paste Ctrl+C and Ctrl+V is not working.