Update theme.nss (#675)

Added accent colours for glyph icons (works in both light and dark modes), adjusted margin, prefix, separator and orientation to more closely match the default Windows 11 context mene design.

Resources/Extras/Nilesoft/imports/theme.nss

@@ -1,4 +1,4 @@
-theme
+theme
 {
 	name = "modern"
 	dark = sys.dark
@@ -9,4 +9,52 @@
 		effect = default
 	}
 	image.align = 2
-}
+	image.color = theme.islight ? [auto, color.accent] : [auto, color.accent_light2]
+
+	item
+	{
+		opacity = 50
+		radius = 1
+		prefix = 0
+		padding = [10, 4]
+		margin = [4,2]
+	}
+
+	separator
+	{
+		size = 1
+		color = default
+		opacity = default
+		margin = [0,1]
+	}
+
+	border
+	{
+		enabled = 1
+		size = 1
+		color = #000
+		opacity = theme.islight ? 12 : 25
+		radius = default
+		padding = [0,2]
+	}
+
+	shadow
+	{
+		enabled = 1
+		size = 7
+		color = default
+		opacity = theme.islight ? default : 7
+		offset = 8
+	}
+
+	font
+	{
+		name = "Segoe UI Variable Text"
+	}
+
+	layout
+	{
+		popup = -5
+	}
+
+}