webadmin: readonly label editors

- Modified readonly label editors to not use a parser as they
  are readonly. This fixes potential issues different locales
  as the values in different locales will not properly parse
  back into their original values.

Change-Id: I5d485f40d574df26ab4b4a0f6f60679e2c2b2506
Signed-off-by: Alexander Wels <awels@redhat.com>