Hi Robert,
I just reproduced the bug when changing the category icon, thank you
for reporting it.
Adding more space between plus sign and start button will be pretty
easy, will be done in the next version.
Regarding the file manager: I will check how/if it is possible to
include it as a choice. I fear though that this would need another
permission (maybe read file system) and I'll have to find out whether
I can limit the file manager search for images.
Thanks again
Martin