修改标绘功能缺少提示信息问题

Author: hhyu1

examples/leaflet/plot_dynamicPlot.html

@@ -255,11 +255,11 @@
              onclick="setSymbolAlighUp()"></span></li>
             <li><span class="icon iconfont icon-align-bottom" title="下对齐"
              onclick="setSymbolAlighDown()"></span> </li>
-           <li><span class="icon iconfont icon-vertical-center title="竖直居中对齐"
+           <li><span class="icon iconfont icon-vertical-center" title="竖直居中对齐"
             onclick="setSymbolAlighVerticalcenter()"></span></li>
-           <li style="border-right: 1px solid #ccc"><span class="icon iconfont icon-horizontal-center"
+           <li style="border-right: 1px solid #ccc"><span class="icon iconfont icon-horizontal-center" title="水平居中对齐"
             onclick="setSymbolAlighHorizontalcenter()"></span></li>
-            <li><span class="icon iconfont icon-equal-width"等宽"
+            <li><span class="icon iconfont icon-equal-width" title="等宽"
              onclick="setSymbolEqualWidth()"></span></li>
             <li><span class="icon iconfont icon-equal-high" title="等高"
              onclick="setSymbolEqualHeight()"></span></li>