Add anchors to the troubleshooting parts of the installation doc

Originally created by @goupille on #14788 (Redmine)

Some part of the installation documentation are difficult to point to a user seeking support. As an example the following link just point to the top of the page:

https://tails.boum.org/install/win/usb/index.en.html#install-inc-steps-restart-first-time.inline.not-entirely

and not to the troubleshooting part.

it would be great if all those “troubleshooting notes” were anchored.

Or create a page dedicated to issues starting Tails as proposed on https://tails.boum.org/blueprint/support_page/.

Acknowledging that most people will have to go through the troubleshooting instructions, a first version of this could be to:

• Remove the toggle and always display the troubleshooting instructions
• Add a shortcut for the lucky few for whom the Boot Loader Menu will appear directly
• Add anchors to the relevant parts

In the end it shouldn’t be tons of work as I thought initially.

Parent Task: #14548

Related issues

• Related to #15130
• Related to #12474 (closed)
• Related to #10649 (closed)
• Has duplicate #15015 (closed)
• Has duplicate #15129 (closed)
• Blocked by #16925 (closed)
• Blocked by #16926 (closed)