Do not display form symbol in edited cell

issue9818
review312901002

src/sao.less

@@ -441,6 +441,10 @@ img.icon {
         display: flex;
         justify-content: space-between;
 
+        > * {
+            align-self: center;
+        }
+
         .widget, .widget-editable {
             min-width: 0;
             flex-grow: 2;

src/view/tree.js

@@ -2647,6 +2647,8 @@
     Sao.View.EditableTree.Integer = Sao.class_(Sao.View.Form.Integer, {
         class_: 'editabletree-integer',
         init: function(view, attributes) {
+            attributes = jQuery.extend({}, attributes);
+            delete attributes.symbol;
             Sao.View.EditableTree.Integer._super.init.call(
                 this, view, attributes);
             Sao.View.EditableTree.editable_mixin(this);
@@ -2659,6 +2661,8 @@
     Sao.View.EditableTree.Float = Sao.class_(Sao.View.Form.Float, {
         class_: 'editabletree-float',
         init: function(view, attributes) {
+            attributes = jQuery.extend({}, attributes);
+            delete attributes.symbol;
             Sao.View.EditableTree.Float._super.init.call(
                 this, view, attributes);
             Sao.View.EditableTree.editable_mixin(this);