Events+ - small spelling error

Small spelling error in source file found during translation.

Working area: https://premium.wpmudev.org/translate/projects/eab/

1) Spelling - "toltip"
Record: "Select which items should be displayed in the toltip, i.e. when visitor places the mouse over the event."
File: lib/plugins/eab-events_weekly_calendar.php:437
Solution: "Select which items should be displayed in the tooltip, i.e. when visitor places the mouse over the event."

and lib/plugins/eab-events_weekly_calendar.php:326
has empty value. Ignore that one for now.