Anaconda 45.12

• anaconda-generator: /usr-support (cmdr)
• webui boot.iso: stop installing slitherer in lorax build (k.koukiou)
• data: default Web UI browser to Firefox on Fedora but for live spins
  (k.koukiou)
• fix: use Str type for ActiveInstallationTask and call super() (adamkankovsky)
• fix(storage): update device_spec after reformatting in manual partitioning
  (k.koukiou)
  Resolves: rhbz#2463653
• storage: Start stratisd during storage module initialization (vtrefny)
• spec: Add Stratis packages as dependencies to install-env-deps (vtrefny)
• Track active installation task in the backend (adamkankovsky)
• test: add test for InstallWithTasks in boss module (adamkankovsky)
• fix(bootc): show bootc error output in the installation error dialog
  (bciconel)
• flatpak: honor %%packages --ignoremissing (bciconel)
• flatpak: surface errors when requested flatpaks cannot be installed
  (bciconel)
• modules: rpm_ostree: fix bootc install when /boot is on root partition
  (k.koukiou)
• Revert "fix: persist checkisomd5 media verification output in the journal"
  (k.koukiou)