Include the project name in the export file name

**Is your feature request related to a problem? Please describe.**
When saving my annotations for a project as a JSON file, I get the following default name: **project-5-at-2023-04-03-10-10-2f34c467.json**
I only have 2 projects, but I may have created 5 in total since I installed LS (I deleted the others). The 5 seems to be the count of projects ever created, which I find meaningless here.

**Describe the solution you'd like**
I would like the exported json filename to include the real project name instead of this count, like: **MyProject-2023-04-03-10-10-2f34c467.json**

**Describe alternatives you've considered**
No alternatives considered.

**Additional context**
N/A