Feature Request: Custom Visible Range

[KisLaszloDaniel]

Hello @MayGo . First of all, thank you for this awesome tool/project.
Usually i am tracking stuff on an exact time range, therefore it would be awesome if (around Visible Range) would be a a Start/End Time Frame input beside the ALL day/AM/PM/Evening/Hour.
I know there is a slider to able set this, but it cannot be set it precisely and also most of the time this slider is buggy.
Something like this:

[MayGo]

thanks, your feedback means a lot!
Will add I.
Also will try to fix the sliders, I know they are buggy. Need to update some libraries and need to update code accordingly.