Provide a manual method for importing items

I've created a simple form for now, with no functionality. Need to have a think about the API calls. Should we just process client ids? This is an example using randomly generated customer ids. We could move the process function to another class and call that with the options from the user checkbox. Unsure if we can do a date range.

Hey,

I think this is ready for review. Created a new form at the route: admin/config/media/sharpstream/process which will just present the user with options which they have entered in the config under customer ids. Upon selecting and submitting, it will loop through all items and process them.

Please could you review MR !3

Nice thanks @NexusNovaz, looks really good - added some trivial suggestions