Fix multi-action dialogs

[the-jesus]

This fixed the problem with the confirmation dialog of the multi-action dialog. Also fixing that presets couldn't be deleted.

[t0b3]

double check you committed everything and tested it thouroughly...

Traceback (most recent call last):
  File "~/.config/inkscape/extensions/silhouette_multi.py", line 33, in <module>
    from silhouette.Dialog import Dialog
ModuleNotFoundError: No module named 'silhouette.Dialog'

[the-jesus]

Yeah, don't know why, but I must have forgotten to check in the file. I have never programmed python before, tbh. So I hope it works now.

[t0b3]

running with this PR leads to

Traceback (most recent call last):
  File "/home/thomas/.config/inkscape/extensions/silhouette_multi.py", line 33, in <module>
    from silhouette.Dialog import Dialog
  File "/home/thomas/.config/inkscape/extensions/silhouette/Dialog.py", line 1, in <module>
    import wx
ModuleNotFoundError: No module named 'wx'

seems like there is no clean error handling implemented for cases w/o wx. can you reorder the imports and softfail with some more meaningful msg?

... and obviously you need to tweak your code to pass the tests

PS: can you elaborate on what exact problem this PR fixes? feel free to report an issue on that... THX

[the-jesus]

Please excuse me for making so much work. I now try to deal with the errors regarding the missing wx library.
The changes should fix the issue with the dialogs of the multi action. The "preset delete" and the "execute" doesn't work. This problem is mentioned here: #213
So please give it another try.

[t0b3]

@the-jesus thank you for your work and your explanations
@gwhitney can you review this PR?

[gwhitney]

Haven't used inkscape-silhouette in a while (haven't happened to need to cut anything intricate) but would be happy to give this a spin. However, I am busy through Thanksgiving weekend -- can it wait until the following week?

[the-jesus]

Hi, how have you been?
Here is just a quick reminder. 😝