Adds select all unit production hotkey (#7824)

Co-authored-by: Garen7 <Garen7@users.noreply.github.com>

core/src/mindustry/input/Binding.java

@@ -20,6 +20,7 @@ public enum Binding implements KeyBind{
     break_block(KeyCode.mouseRight),
 
     select_all_units(KeyCode.g),
+    select_all_unit_factories(KeyCode.h),
 
     pickupCargo(KeyCode.leftBracket),
     dropCargo(KeyCode.rightBracket),

core/src/mindustry/input/DesktopInput.java

@@ -279,6 +279,7 @@ public class DesktopInput extends InputHandler{
 
         if(commandMode && input.keyTap(Binding.select_all_units) && !scene.hasField() && !scene.hasDialog()){
             selectedUnits.clear();
+            commandBuildings.clear();
             for(var unit : player.team().data().units){
                 if(unit.isCommandable()){
                     selectedUnits.add(unit);
@@ -286,6 +287,16 @@ public class DesktopInput extends InputHandler{
             }
         }
 
+        if(commandMode && input.keyTap(Binding.select_all_unit_factories) && !scene.hasField() && !scene.hasDialog()){
+            selectedUnits.clear();
+            commandBuildings.clear();
+            for(var build : player.team().data().buildings){
+                if(build.block.commandable){
+                    commandBuildings.add(build);
+                }
+            }
+        }
+
         if(!scene.hasMouse() && !locked && state.rules.possessionAllowed){
             if(Core.input.keyDown(Binding.control) && Core.input.keyTap(Binding.select)){
                 Unit on = selectedUnit();