Touch controls: Add a HOME button, and list HOME with the standard PSP controls

POPS (the PS1 emulator) uses HOME for its menu. The touch button is hidden by
default, and HOME still has no default key mapping. It's also appended to the
custom button and gesture key lists.

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

Core/KeyMap.cpp

@@ -469,6 +469,7 @@ const KeyMap_IntStrPair psp_button_names[] = {
 	{CTRL_TRIANGLE, "Triangle"},
 	{CTRL_START, "Start"},
 	{CTRL_SELECT, "Select"},
+	{CTRL_HOME, "Home"},
 	{CTRL_LTRIGGER, "L"},
 	{CTRL_RTRIGGER, "R"},
 
@@ -538,7 +539,6 @@ const KeyMap_IntStrPair psp_button_names[] = {
 	{VIRTKEY_AXIS_RIGHT_X_MIN, "RightAn.Left"},
 	{VIRTKEY_AXIS_RIGHT_X_MAX, "RightAn.Right"},
 
-	{CTRL_HOME, "Home"},
 	{CTRL_HOLD, "Hold"},
 	{CTRL_WLAN, "Wlan"},
 	{CTRL_REMOTE_HOLD, "Remote hold"},