Prevent unnecessary ground mesh recreation when switching tabs

Add logic to ignore BLOCK_MOVE events for scene blocks if no input has changed, preventing the default ground mesh from being recreated when switching between editor tabs.

Replit-Commit-Author: Agent
Replit-Commit-Session-Id: e0dc7adb-ccb6-4ae2-a1ba-b39688edbccb
Replit-Commit-Checkpoint-Type: full_checkpoint
Replit-Commit-Event-Id: ff9228da-c115-4989-b4ac-6e7d25a2c470

Author: TracyGardner

ui/blockmesh.js

@@ -1103,6 +1103,11 @@ export function updateMeshFromBlock(mesh, block, changeEvent) {
       block.type === "create_ground" ||
       block.type === "create_map"
     ) {
+      if (changeEvent.type === Blockly.Events.BLOCK_MOVE) {
+        if (flock.meshDebug)
+          console.log("Ignoring BLOCK_MOVE for scene block with no input change");
+        return;
+      }
       changed = "COLOR";
     } else {
       if (flock.meshDebug)