More user-friendly report of missing keys

[Zegeri]

This warning will almost surely show in the log file. This intends to make this warning more readable.

Before:

! Can't convert dik_name for dik[47]
! Can't convert dik_name for dik[52]
! Can't convert dik_name for dik[102]
! Can't convert dik_name for dik[104]
! Can't convert dik_name for dik[105]
! Can't convert dik_name for dik[106]
! Can't convert dik_name for dik[107]
! Can't convert dik_name for dik[108]
! Can't convert dik_name for dik[109]
! Can't convert dik_name for dik[110]
! Can't convert dik_name for dik[123]
! Can't convert dik_name for dik[124]

After:

! Can't find a key for kLBRACKET
! Can't find a key for kAPOSTROPHE
! Can't find a key for kPOWER
! Can't find a key for kF13
! Can't find a key for kF14
! Can't find a key for kF15
! Can't find a key for kF16
! Can't find a key for kF17
! Can't find a key for kF18
! Can't find a key for kF19
! Can't find a key for kCUT
! Can't find a key for kCOPY

[Xottab-DUTY]

It's better to say
! Can't find a key name for %s
Otherwise user will misunderstood the log ;)

[FreeZoneMods]

Maybe remove such commented lines?

[Xottab-DUTY]

They are useful for debug too ;)