Adds LAccess.bufferUsage, fixes wrong property names for displayWidth and displayHeight (#10679)

* Adds LAccess.bufferUsage - sensable property returning number of unprocessed commands in the graphics buffer of a display.
Fixes wrong property keys (lacess.* -> laccess.*) of the recently added displayWidth and displayHeight properties.

* Revert unnecessary bundle updates

core/src/mindustry/world/blocks/logic/LogicDisplay.java

@@ -110,6 +110,7 @@ public class LogicDisplay extends Block{
         public double sense(LAccess sensor){
             return switch(sensor){
                 case displayWidth, displayHeight -> displaySize;
+                case bufferUsage -> commands.size;
                 default -> super.sense(sensor);
             };
         }