fix: isolate PortMaster controller exit handling

scripts/portmaster/netfishing.gptk

@@ -0,0 +1,40 @@
+# NETfishing reads the controller directly. GPTOKEYB is retained only for the
+# PortMaster force-quit chord, so every keyboard and mouse binding is disabled.
+
+back = \"
+guide = \"
+start = \"
+
+a = \"
+a_hk = \"
+b = \"
+b_hk = \"
+x = \"
+x_hk = \"
+y = \"
+y_hk = \"
+
+l1 = \"
+l1_hk = \"
+l2 = \"
+l2_hk = \"
+l3 = \"
+r1 = \"
+r1_hk = \"
+r2 = \"
+r2_hk = \"
+r3 = \"
+
+up = \"
+down = \"
+left = \"
+right = \"
+
+left_analog_up = \"
+left_analog_down = \"
+left_analog_left = \"
+left_analog_right = \"
+right_analog_up = \"
+right_analog_down = \"
+right_analog_left = \"
+right_analog_right = \"