fixed Copying AH64 in mission editor does not copy preset names

[FalcoGer]

When copying an AH64 in the mission editor, it does copy the preset frequencies, but does not copy the preset unit ids and callsigns and primary frequency settings.

To reproduce:

1. Open mission editor
2. Place AH-64D Blk. II Apache
3. Open Properties -> Datalinks -> Settings
4. Enter valid names, callsigns and primary freq
5. Copy unit
6. Paste unit
7. Open Properties -> Datalinks -> Settings on the pasted unit
8. It's the default PRESET 1/PRE 1, etc

Expected results: Since the frequencies for the presets were copied (Radio Settings), the names for those presets should be copied as well.

[BIGNEWY]

this is reported

thank you