Add/Edit Tags Dialog is Difficult to Use
Please describe the problem you are trying to solve
Editing and adding tags currently is implemented with a relatively small modal dialog with a single-line text input when tags are seperated with commas. This method is difficult to use if tag names are long or there are many tags that are set on a photo.
Other solutions you have considered
Suggest changing implementation to use a larger dialog box where there are separate data fields for typing-in/searching-for a tag and for the tags that are currently assigned. Possible layout:
Also, this solution would allow Shotwell to move away from using commas to separate tags. There may be a legitimate reason to include a comma in a tag name (e.g. in place names: "Detroit, Michigan"; in names that have surname first: "Doe, John").