Problem description: Incorrect description of the trendcount() function in "Function" field in the "Condition" overlay dialogue. It clearly mentions fields that are not even available for this function:
trendcount() - Number of successfully retrieved values V (which fulfill operator O) for period T with exact period shift
Fields "O" and "V" dont exist for this function.

Steps to reproduce:

1. Open configuration of any existing host
2. Open the list of triggers and click on the "Create trigger"
3. Click on the "Add" button next to the Problem expression field
4. In the opened Condition overlay dialogue select the trendcount() and check its description

Result: looks like a part of the description is copied from the count() function. It contains parameters that the trendcount() function doesn't have.
Expected: function description should not contain any misleading information.

Example: