Update share icon and transcript positions

[danielebogo]

Fixes #2727

Replace Transcript icon with Share

Shelf	More

To test

1. Install the app fromtrunk.
2. Play something.
3. Change your shelf items order.
4. Install the app from this branch.
5. Go to the player. Notice that the order of shelf items has not changed.
6. Delete the app and restart.
7. Start the app.
8. Play something.
9. Confirm that share icon is the 4th item in the shelf
10. Tap the ••• in shelf and confirm transcript is the 2nd item in More Action.

Checklist

• I have considered if this change warrants user-facing release notes and have added them to CHANGELOG.md if necessary.
• I have considered adding unit tests for my changes.
• I have updated (or requested that someone edit) the spreadsheet to reflect any new or changed analytics.

[pocketcasts]

Version 7.83 has now entered code-freeze, so the milestone of this PR has been updated to 7.84.

[SergioEstevao]