desktopToDarwinBundle: Implement %F and %U Exec field codes

Similar to the implementation of the `%f` and `%u` field codes. In this
case the amount of arguments passed poses no problem but the position
could, at least in theory.

This finishes the implementation of all the non-deprecated field codes.
As a part of that, repetitions of field codes are left alone. Originally
all field codes were removed. Now we replace only the first occurence.
This is correct for at least `%f`, `%u`, `%F` and `%U` because at most
one of them is permitted.

Shortcomings:

  1. We replace `%[cfFikuU]` patterns one at a time. This means if the
     right field code appears as part of the rest of the `Exec` field or
     in a field code that was substituted earlier.

  2. If any field code is repeated, only the first occurence is
     substituted.

0 files changed, 0 insertions, 0 deletions