Unreadable text on button in TIFF Export dialog

[frcroth]

Context

The label on the Export format selector is not legible, so I have to select the other one (or hover) to see what it says.

Current Behavior

Steps to Reproduce the bug

1. With worker enabled, select download on an annotation
2. Switch to TIFF Export Tab

Your Environment for bug

• Browser name and version: Chromium Version 131.0.6778.85 (Official Build) snap (64-bit)
• Operating System and version: Ubuntu 22.04
• Version of WEBKNOSSOS (Release or Commit): 2704f0b
• Specific to long-running jobs (set jobsEnabled=true in application.conf)