Use pure javascript library for postgresql.
Change Numeric Keyboard to Keypad

Added pattern to html to make the keyboard a keypad

Closes #4426

    Added pattern="[0-9]*" to the postsPerPage input on general.hbs
Merge pull request #4422 from jaswilli/pg

Use pure javascript library for postgresql.
Merge pull request #4427 from dbalders/master

Change Numeric Keyboard to Keypad
Reset slugValue when the user changes

Closes #4411
- Previously, saving the user’s slug would lead to the slug value being
‘stuck’ on that saved value, even if one navigated to a different
user’s profile settings.
Merge pull request #4428 from felixrieseberg/iss4411

Reset slugValue when the user changes
Drop socket reference on close.

Closes #1976
- Prevent the unbounded memory growth caused by maintaining
  a reference to the socket object that is created on every connection.
Merge pull request #4430 from jaswilli/leak

Drop socket reference on close.