Help screen and statusbar font color does not obey theme

Required information:

• gotop version (gotop -V): 3.0.0
• The output of uname -a: Linux vagrant 4.15.0-66-generic #75-Ubuntu SMP Tue Oct 1 05:24:09 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux
• Terminal emulator (e.g. iTerm or gnome terminal):
• Any relevenat hardware info:
• tmux version if using tmux:

Also please copy or attach ~/.local/state/gotop/errors.log if it exists and contains logs:

Issue:

The help text does not obey color theme.

Reproduction steps:

1. Use a terminal with white background
2. Run gotop --color default-dark --statusbar
3. Notice the status bar time is white over white
4. Press ?
5. Notice the help text is white over white

Actual behavior:

When using gotop --color default-dark the help text is still white over white as shown in this screenshot:

Expected behavior:

Expecting the text to be readable - black over white.