Please, add the close button

, ... and change the backgrounds (darker) of the sharpen effect (for example) for the dark MP theme.

... close button on windows dialog = ⊗ & ⊝ are missing ... only ⊡ is avalaible (on widowed mode - for classic and dark theme)
and for example ... under Action tab: ... here "Sharpen" and the word "intensity" are very difficult to read ... (a pale gray text color)