windows screensavers: improve description

apps/Windows Screensavers/description

@@ -1,7 +1,11 @@
-Botspot's collection of 14 Windows screensavers that run well on Raspberry Pi.
-If you don't have Wine installed, this app will install it for you.
+14 Windows screensavers that run well on Raspberry Pi.
+
 Once installed, you can launch Botspot's Screensavers GUI from:
 Menu -> Preferences -> Windows Screensavers.
 To run in terminal: ~/Screensavers/gui
 
+Preview a screensaver, change its settings, and enable it to run after a specified duration of inactivity. The screensaver will not start while audio is playing.
+
+Note: If you don't have Wine installed, this app will install it for you.
+
 In addition to the Windows Screensavers, Botspot's Screensaver GUI also allows convenient installation of GPU-accelerated Xscreensaver, preset to enable the best ones out of 230 screensavers.