修复发送文本框粘贴后格式改变；

修复某些表情没识别问题

mainwindow.ui

@@ -90,6 +90,9 @@
         <property name="lineWidth">
          <number>1</number>
         </property>
+        <property name="acceptRichText">
+         <bool>false</bool>
+        </property>
        </widget>
       </item>
      </layout>

recvtextedit.cpp

@@ -207,7 +207,7 @@ QString RecvTextEdit::textHtmlStr(const TextContent *content)
     for (auto i = 0; i < EMOJI_LEN; i++)
     {
          auto resName = QString(":/default/res/face/")+QString::number(i+1)+".gif";
-         auto emojiStr = g_emojis[i];
+         auto emojiStr = QString(g_emojis[i]).toHtmlEscaped();
          QString imgTag = "<img src=\""+resName+"\"/>";
          htmlStr.replace(emojiStr, imgTag);
     }