Remapped the numpad keys on linux when numlock is off

On Linux, when using the numpad while numlock is off doesn't do
anything. Made the numpad keys map to the correct control keys.

Resolves: #54814.

platform/linuxbsd/key_mapping_x11.cpp

@@ -108,17 +108,21 @@ static _XTranslatePair _xkeysym_to_keycode[] = {
 	{ XK_KP_7, Key::KP_7 },
 	{ XK_KP_8, Key::KP_8 },
 	{ XK_KP_9, Key::KP_9 },
-	// same but with numlock
-	{ XK_KP_Insert, Key::KP_0 },
-	{ XK_KP_End, Key::KP_1 },
-	{ XK_KP_Down, Key::KP_2 },
-	{ XK_KP_Page_Down, Key::KP_3 },
-	{ XK_KP_Left, Key::KP_4 },
-	{ XK_KP_Begin, Key::KP_5 },
-	{ XK_KP_Right, Key::KP_6 },
-	{ XK_KP_Home, Key::KP_7 },
-	{ XK_KP_Up, Key::KP_8 },
-	{ XK_KP_Page_Up, Key::KP_9 },
+	// same keys but with numlock off
+	{ XK_KP_Insert, Key::INSERT },
+	{ XK_KP_End, Key::END },
+	{ XK_KP_Down, Key::DOWN },
+	{ XK_KP_Page_Down, Key::PAGEDOWN },
+	{ XK_KP_Left, Key::LEFT },
+	// X11 documents this (numpad 5) as "begin of line" but no toolkit
+	// seems to interpret it this way.
+	// On Windows this is emitting Key::Clear so for consistency it
+	// will be mapped to Key::Clear
+	{ XK_KP_Begin, Key::CLEAR },
+	{ XK_KP_Right, Key::RIGHT },
+	{ XK_KP_Home, Key::HOME },
+	{ XK_KP_Up, Key::UP },
+	{ XK_KP_Page_Up, Key::PAGEUP },
 	{ XK_F1, Key::F1 },
 	{ XK_F2, Key::F2 },
 	{ XK_F3, Key::F3 },