2 new widgets and sub-stringed long names

- Added new widget "Tickets by source".
- Added new widget "Open tickets".
- In resource, queue and account widgets names are now sub-stringed to
fit into one line.
2 new widgets and sub-stringed long names

- Added new widget "Tickets by source".
- Added new widget "Open tickets".
- In resource, queue and account widgets names are now sub-stringed to
fit into one line.
Merged pull request by mind3m into the 1.4.0 branch. Thank you! Closes #15