I has to setup many Piwik installations for different clients.

The Timezone selector in the installation is very hard to use. I can't choose a correctly timezone for the city.

For example: a website is located in San Francisco, California, USA. Which is PDT timezone. We can not exactly choose this city as it's not in the list, and finding the city name should be go through all the list.

Which then I decide to end up by finding the Timezone from https://www.timeanddate.com/worldclock/usa/san-francisco
and manually choose UTC-7

Suggestion:
Increase the usability of this service by a filter or search box, we might integrate with other service to get the correct timezone based on city or country name.