If share link is in iframe, some page functionality will now work.
We can add options for share configuration that would make.
Embedded share link options:

• Remove login

• Remove subscribe

• Remove header

For research, does/can it work in iframe:

• Share protected by password

• selected users

For testing:

For example:
https://jira.external-share.com/issue/c724493a-3381-4267-bb3e-30dca67edae9

will display header, subscribe.

but this link:
https://jira.external-share.com/issue/c724493a-3381-4267-bb3e-30dca67edae9?iframe=true
if query parameter exists iframe then we hide header and subscribe.

same for Board/filter/roadmap share