Workarround for the issue931. Not solve the issue but implement correctly the --disable-<plugin> option for all plugins

Remove 'glances_' prefix from filenames.

Disable CPU, MEM, SWAP and LOAD done. Had to change the glances_curses module to compute the QL size

- First line should end with a period
- No blank lines allowed after function docstring
- 1 blank line required between summary line and description
- 1 blank line required before class docstring
- Multi-line docstring closing quotes should be on a separate line
- No whitespaces allowed surrounding docstring text
- One-line docstring should fit on one line with quotes
- Use r""" if any backslashes in a docstring

A setter method always takes a parameter and does not return a value.

Rename 'set_stats_snmp' method to 'get_stats_snmp'.

Don't redefine built-ins. Unless it's wanted.

Empty sets evaluate to False.

Clean up import order.

One-line docstring should not occupy 3 lines
Expected 1 blank line *before* class docstring
First line should end with '.'
Blank line missing between one-line summary and description
No blank lines allowed *after* method docstring
Use r""" if any backslashes in a docstring

Use format() instead of % method.

Use the longest string as reference and alignment point.

- remove obsolete code
- glances_password: update comments and fix typos
- re-apply fix to avoid string format conflicts (screwed up after
  feature branch merges)
- strip trailing whitespaces
- flake8