tweak: bumped default border_radius from 2 to 4

Just trying to match other UIs in the world that use bigger radius (mac, win, gnome).

script-opts/uosc.conf

@@ -147,7 +147,7 @@ font_scale=1
 # Border of text and icons when drawn directly on top of video
 text_border=1.2
 # Border radius of buttons, menus, and all other rectangles
-border_radius=2
+border_radius=4
 # A comma delimited list of color overrides in RGB HEX format.
 # Defaults: foreground=ffffff,foreground_text=000000,background=000000,background_text=ffffff,curtain=111111,
 #           success=a5e075,error=ff616e

scripts/uosc/main.lua

@@ -67,7 +67,7 @@ defaults = {
 	scale_fullscreen = 1.3,
 	font_scale = 1,
 	text_border = 1.2,
-	border_radius = 2,
+	border_radius = 4,
 	color = '',
 	opacity = '',
 	animation_duration = 100,