- removed leading spaces before markup which can affect rendering in
  some cases
- added shareOption CSS class to group and keep share option checkbox +
  label
- moved ".showCruds" arrow into the matching shareOption to keep the
  arrow together with the checkbox

Action icons now appear properly in public link page.
More actions are now CSS icons.

When clicking on the unshare link (trash icon), the correct link element
needs to be used instead of whatever child was clicked. Then, that
element might contain a visible loading icon.

This fixes the spinner detection and also prevents a full page reload in
case the spinner was visible.

- Rely on class names instead of global ids
- When global ids are needed for label+checkbox, append the view id
  (cid) to the element's id

This fixes the checkboxes when multiple sidebars exist in the DOM.

Only toggle the current row

Some events need preventing default like unshare, but setting
permissions doesn't.

Display share icon in file list row.
Update share icon status when the sharing state changed.

share and unshare via link (not yet password). also some internal changes to reduce unnecessary rendering