Feat：去掉文本编辑框元素的某些样式，避免文本模糊的问题

simple-mind-map/src/core/render/TextEdit.js

@@ -292,9 +292,6 @@ export default class TextEdit {
         outline: none; 
         word-break: break-all;
         line-break: anywhere;
-        transform-style: preserve-3d;
-        filter: contrast(1) saturate(1);
-        backface-visibility: hidden;
       `
       this.textEditNode.setAttribute('contenteditable', true)
       this.textEditNode.addEventListener('keyup', e => {

simple-mind-map/src/plugins/RichText.js

@@ -239,9 +239,6 @@ class RichText {
         outline: none; 
         word-break: break-all;
         padding: ${paddingY}px ${paddingX}px;
-        transform-style: preserve-3d;
-        filter: contrast(1) saturate(1);
-        backface-visibility: hidden;
       `
       this.textEditNode.addEventListener('click', e => {
         e.stopPropagation()