Unit Transport And on Screen selecting instead (#10740)

* Select all Transport Hotkey,

- hotkey for selecting Payloadc units
- Changed all select all keys to be only select units on screen

* s

* Inverse

* maybe actually set the temp var

* overlap

* blindness

core/src/mindustry/input/Binding.java

@@ -42,6 +42,8 @@ public class Binding{
 
     selectAllUnits = KeyBind.add("select_all_units", KeyCode.g),
     selectAllUnitFactories = KeyBind.add("select_all_unit_factories", KeyCode.h),
+    selectAllUnitTransport = KeyBind.add("select_all_unit_transport", KeyCode.unset),
+    selectAcrossScreen = KeyBind.add("select_across_screen", KeyCode.altLeft),
 
     cancelOrders = KeyBind.add("cancel_orders", KeyCode.unset),