Allow installation of openblas with gimp or inkscape

The openblas package conflicts with the blas package, which is installed for inkscape and gimp.
This conflict stops the installation, because pacman doesn't replace packages automatically with `--noconfirm`.
To resolve this openblas has to be installed before common packages.

calamares-settings.conf

@@ -47,10 +47,10 @@ sequence:
         - postcfg
         - postcfglip
     - show:
-        - packagechooser@common
-        - packagechooser@mathe
         - packagechooser@physik
+        - packagechooser@mathe
         - packagechooser@informatik
+        - packagechooser@common
     - exec:
         - packages
         - makedoku