[FIX] Company Logo not shown if database name contains capitals(Courtesy: Karel Marissens). (Maintenance Case: 592257)
[FIX] web_calender: when filter is of kind object it was not handled properly
[FIX] Error when selecting filters in calendar view

e.g. calendar view of customer invoice

Also attempted to make the code flow slightly simpler by just forcing
the filter to a [value, label] pair in all cases.
[FIX] incorrect company logo on databases with uppercase letters