Analytics page Calendar date picker widget does not support dark theme

[hsandt]

Describe the bug
When using dark theme on the website, the Analytics calendar date picker widget shows part of the area in white, making the numbers hard to read.

To Reproduce
Steps to reproduce the behavior:

1. Enable Dark mode
2. Go to some game Analytics page
3. Click on the From or To date to open the calendar widget
4. See white area

Expected behavior
Background should be dark everywhere

Screenshots

Desktop (please complete the following information):

• OS: Linux Ubuntu 22.04
• Browser: Chrome Version 126.0.6478.61 (Official Build) (64-bit)

Additional context
I'm trying to check analytics on older dates.
I'm also unable to enter numerical values in the date field but it doesn't seem related (I'll open another thread for this).

[leafo]

All the date & time pickers on the site have been replaced with browser native ones, which should make them compatible with any themeing