Fix toolbar icons in multi-image view are not selectable

[sashadev-sky]

Fixes #698 (<=== Add issue number here)

Make sure these boxes are checked before your pull request (PR) is ready to be reviewed and merged. Thanks!

• PR is descriptively titled 📑 and links the original issue above 🔗
• tests pass -- look for a green checkbox ✔️ a few minutes after opening your PR -- or run tests locally with grunt test
• code is in uniquely-named feature branch and has no merge conflicts 📁
• screenshots/GIFs are attached 📎 in case of UI updates
• @mention the original creator of the issue in a comment below for help or for a review

We're happy to help you get this ready -- don't be afraid to ask for help, and don't be discouraged if your tests fail at first!

If tests do fail, click on the red X to learn why by reading the logs.

Please be sure you've reviewed our contribution guidelines at https://publiclab.org/contributing-to-public-lab-software

Thanks!

========
Bug fixes:

• Fix bug where toolbar icons in multi-image view are not selectable
• Stop allowing deletion, lock, unlock, & export of collection of images by hotkey when the corresponding collection tool isn't present
• Fix mixup with structure of question when confirming deletion of multiple images
• Fix bug where you cant do multi image delete if the single image doesnt have a delete tool
• Bump version to 0.20.7
  =========

[gitpod-io]

[VladimirMikulic]

Nice job as always!