Improved date filter options

To make filtering for specific dates and time ranges easier, we added the following options for date filters to Weflow:

• Today [new]
• Tomorrow
• Yesterday
• Last 7 days
• Last 14 days [new]
• Last 30 days [new]
• Last 60 days [new]
• This week [new]
• Last week [new]
• This month
• Last month
• This quarter [new]
• Last quarter
• This year [new]
• Last year