Iteration 4: Create VeraCrypt Mounter application

Originally created by @segfault on #15043 (Redmine)

During the UX sprint we decided that it would improve the UX if we created an extra application to let the user choose and unlock file containers.
This is not a must, as there will be other ways to unlock file containers. Therefore this will only be done as part of the SponsorW work if we still have time for it after the other work is done.

This application would only exist in Tails.

The canonical location for the source code is currently https://gitlab.com/segfault3/veracrypt-mounter. See below for discussions about how it’s then imported/integrated into Tails.

Feature Branch: segfault:feature/14481-TCRYPT-support-beta

Attachments

• Buttons with icons.png
• Buttons with labels.png
• cross.png
• buttons with icons (X button without relief).png
• buttons with labels (X button without relief).png

Parent Task: #14468 (closed)

Related issues

• Related to #15628 (closed)
• Related to #15680 (closed)
• Blocks #14476 (closed)