Cycle Preset Confirmation

[wunditta]

Option to wait for manual confirmation to apply the preset. Use case:

1. When cycling presets other commands are ignored and motorized sliders will not move.
2. There is a timeout for this, which should be made configurable (now it is 2 secs)
3. After the timeout other commands are accepted and sliders will move
4. A new option should be added: Confirm preset: Yes/No
5. If another commands is pressed, it depends on the option above:
   5.a. No: This is like now, the last set preset will be kept and the new command is done
   5.b. Yes: The last set preset will be undone, so that the new command is done without an applied preset. In order to keep the preset the user must confirm it with a button press. Therefore a new function must be added: Confirm Develop Preset

This must be done in Client.lua

[wunditta]

In addition using the confirmation button will apply the preset to all selected photos not only the active one.