Update ui_qt.cpp

Introduced the term "10-foot user interface" to describe the main window.

Reference: https://en.wikipedia.org/wiki/10-foot_user_interface

Author: davidhedlund

ui/drivers/ui_qt.cpp

@@ -1836,9 +1836,9 @@ void MainWindow::showWelcomeScreen()
 	  "that's functional for launching content and managing playlists.<br>\n"
       "<br>\n"
       "Settings can be configured via &ldquo;View -> Settings...&rdquo; in Desktop Mode window, "
-	  "or &ldquo;Main Menu -> Settings&rdquo; in the main interface window — both access the same settings. "
-	  "But many actions only function in the main interface window, including these default "
-	  "hotkey assignments:\n"
+	  "or &ldquo;Main Menu -> Settings&rdquo; in the 10-foot user interface window (the main window) "
+	  "— both access the same settings. But many actions only function in the 10-foot UI, including "
+	  "these default hotkey assignments:\n"
       "<ul>\n"
       "<li>F1  - Switches the current display between menu and content</li>\n"
       "<li>F5  - Bring the Desktop Menu back if closed</li>\n"