Correct find usage

Hello,

I'm using this plugin with "table in table". If one table has an other in it, the th's are not in the corrent position and some td's slide out from the calculated width. Please use the "find" method correctly, because "find('td')" finds all the td's in the DOM if you use "find('>td')" it's going to only find the children, not all of the objects.

src/bootstrap-table.js

@@ -577,7 +577,7 @@
             columns = [],
             data = [];
 
-        this.$header = this.$el.find('thead');
+        this.$header = this.$el.find('>thead');
         if (!this.$header.length) {
             this.$header = $('<thead></thead>').appendTo(this.$el);
         }
@@ -619,7 +619,7 @@
             return;
         }
 
-        this.$el.find('tbody tr').each(function () {
+        this.$el.find('>tbody>tr').each(function () {
             var row = {};
 
             // save tr's id, class and data-* attributes
@@ -1359,7 +1359,7 @@
 
         this.trigger('pre-body', data);
 
-        this.$body = this.$el.find('tbody');
+        this.$body = this.$el.find('>tbody');
         if (!this.$body.length) {
             this.$body = $('<tbody></tbody>').appendTo(this.$el);
         }
@@ -1636,7 +1636,7 @@
             }
 
             for (var key in events) {
-                that.$body.find('tr').each(function () {
+                that.$body.find('>tr').each(function () {
                     var $tr = $(this),
                         $td = $tr.find(that.options.cardView ? '.card-view' : 'td').eq(fieldIndex),
                         index = key.indexOf(' '),
@@ -1862,7 +1862,7 @@
 
         var visibleFields = this.getVisibleFields();
 
-        this.$body.find('tr:first-child:not(.no-records-found) > *').each(function (i) {
+        this.$body.find('>tr:first-child:not(.no-records-found) > *').each(function (i) {
             var $this = $(this),
                 index = i;
 
@@ -1956,7 +1956,7 @@
 
         $footerTd = this.$tableFooter.find('td');
 
-        this.$body.find('tr:first-child:not(.no-records-found) > *').each(function (i) {
+        this.$body.find('>tr:first-child:not(.no-records-found) > *').each(function (i) {
             var $this = $(this);
 
             $footerTd.eq(i).find('.fht-cell').width($this.innerWidth());
@@ -2238,14 +2238,14 @@
             rowspan = options.rowspan || 1,
             colspan = options.colspan || 1,
             i, j,
-            $tr = this.$body.find('tr'),
+            $tr = this.$body.find('>tr'),
             $td;
 
         if (this.options.detailView && !this.options.cardView) {
             col += 1;
         }
 
-        $td = $tr.eq(row).find('td').eq(col);
+        $td = $tr.eq(row).find('>td').eq(col);
 
         if (row < 0 || col < 0 || row >= this.data.length) {
             return;
@@ -2253,7 +2253,7 @@
 
         for (i = row; i < row + rowspan; i++) {
             for (j = col; j < col + colspan; j++) {
-                $tr.eq(i).find('td').eq(j).hide();
+                $tr.eq(i).find('>td').eq(j).hide();
             }
         }