add some comments, remove unnecessary console.logs, modify sass sheets to use new ids
fix minor jshint errors
don't assume wrong country if mcc/mnc is entirely unkown

Until now, we simply ask the user for mcc/mnc if the selected country does not have the mcc/mnc of the sim. It's probably better to check first whether we have the mcc/mnc combination at all - if we don't; assume the user still wants to use the im card inserted.

Not knowing the mcc/mnc combination still may not yield best results (e.g. displayed sim cards), but dual-sim + unknown mcc/mnc combination can probably be seen as very unlikely
put all found mcc/mnc combinations in a map, so the associated country can be found easily