preferences: correctly parse input of IEC unit
Make sure IEC units (i.e. KiB, MiB, GiB) are correctly parsed in the text input of memory. This applies to both RAM and Storage Limit preferences.
Fixes issue #901.
Make sure IEC units (i.e. KiB, MiB, GiB) are correctly parsed in the text input of memory. This applies to both RAM and Storage Limit preferences.
Fixes issue #901.