Add ability to reset selected images

[robtimp]

If an image is already selected when a user taps 'Take Photo', it will skip to the secondary action because the numberOfSelectedImages is already > 0, and the photo is added, rather than presenting the camera UI as expected.

Note that the example app avoids this scenario, because the 'Take Photo' action is no longer available once a photo is selected.

This PR adds the ability for an action to reset the selected images, allowing the 'Take Photo' action to work as expected.

[lbrndnr]

Sorry it took me this long to respond.
If I'm not mistaken you can just initialize an action with a primary title and handler only to achieve what you're looking for or is that not it?

[robtimp]

@larcus94 In this case, I still want a secondary handler for the action, I just don't want that handler to be triggered until after the primary handler, but when images are already selected, we jump immediately to the secondary handler.

I just thought it might be useful to add a 'reset' option for these cases.

[lbrndnr]

Hi @robtimp,

I'm not going to add this feature. I thought about it and I think that it's just not worth it.
Sorry for taking so long to respond, I'm so busy with uni.

Thanks for opening the pull request though!