Tablet annotation behavior

[yhmtsai]

This mainly helps #226 .

1. when disable rename file when send to ... and enable store copy of annotaion with suffix, the option Keep only one annotated file (detected by file)
2. when enable keep only one annotation:
   • Send origin.pdf: get origin_suffix.pdf back (same as store copy)
   • Send origin_suffix.pdf: get origin_suffix.pdf by replacement (same as not store copy)
3. Add menu item - Send Annotation to Tablet
   This will send the file which has most suffix in selecting files.
   For example,
   • item contains (A, A_suffix, A_suffix_suffix_suffix): only send A_suffix_suffix_suffix
   • select (A, A_suffix_suffix): only send A_suffix_suffix
   • select (A) : send A
     Note, Send Annotation to Tablet only consider the selecting files. Thus, even if there is A_suffix in the last example, it still send A to tablet because do not select A, A_suffix together. To avoid missing selection, suggest to apply Send Annotation to Tablet on item not files.

I am not entirely sure how to build the menu item. Some hint/comments are helpful.
Currently, I do not find a way to add Send Annotation to Tablet for subfolder.
Also, the text on de/it/fr are done by google translation.
All behavior depends on string, so it does not work on the inconsistent filename and different suffix (will be original behavior)

I am not familiar with javascript.
Also, I am a new user of Zotero, so I am not sure whether this behavior make sense for others.
any comment is welcome

[jlegewie]

Thanks for putting work into this. Unfortunately, I don't have time to review it right now. So it's going to remain as an open pull request for now.