fix: remove canvas transition (#129)

Author: BeksOmega

core/css.js

@@ -55,6 +55,11 @@ const styles = `
     -ms-user-select: none;
   }
 
+  .blocklyBlockCanvas.blocklyCanvasTransitioning,
+  .blocklyBubbleCanvas.blocklyCanvasTransitioning {
+    transition: none;
+  }
+
   .blocklyWidgetDiv.fieldTextInput {
     overflow: hidden;
     border: 1px solid;
@@ -83,13 +88,6 @@ const styles = `
     cursor: pointer;
   }
 
-  .blocklyNonSelectable {
-    user-select: none;
-    -moz-user-select: none;
-    -webkit-user-select: none;
-    -ms-user-select: none;
-  }
-
   .blocklyWsDragSurface {
     display: none;
     position: absolute;