Change "less than" strings for countable items to "fewer than"

[DrewAPicture]

In a variety of places in the Plugin Directory and on profiles, there are strings indicating countable items as being "less than 10" or similar. If the items are countable, it should be "fewer than". :-)

Patch attached.

[Otto42]

Duplicate of #968.

We've had this discussion before. My vote is still for no.

[ocean90]

[5584] 🤷‍♂️