ui: tweak

packages/entity/src/behavior-components/expression.jsx

@@ -238,12 +238,12 @@ const Expression = ({
     Renderables.push(
       <Key
         childrenDescription={{
-          '.': {label: '', type: description.type},
+          '≡': {label: '', type: description.type},
           '≔': {label: '', type: 'void'},
         }}
         key={opPath}
         onChange={(event, value) => {
-          if ('.' === value) {
+          if ('≡' === value) {
             patch({
               op: 'remove',
               path: opPath,
@@ -259,7 +259,7 @@ const Expression = ({
           }
         }}
         path={opPath}
-        value={expressionValue ? '≔' : '.'}
+        value={expressionValue ? '≔' : '≡'}
       />,
     );
     if (expressionValue) {