[SPARK-14544] [SQL] improve performance of SQL UI tab

## What changes were proposed in this pull request?

This PR improve the performance of SQL UI by:

1) remove the details column in all executions page (the first page in SQL tab). We can check the details by enter the execution page.
2) break-all is super slow in Chrome recently, so switch to break-word.
3) Using "display: none" to hide a block.
4) using one js closure for  for all the executions, not one for each.
5) remove the height limitation of details, don't need to scroll it in the tiny window.

## How was this patch tested?

Exists tests.

![ui](https://cloud.githubusercontent.com/assets/40902/14445712/68d7b258-0004-11e6-9b48-5d329b05d165.png)

Author: Davies Liu <davies@databricks.com>

Closes apache#12311 from davies/ui_perf.

Author: Davies Liu

core/src/main/resources/org/apache/spark/ui/static/webui.css

@@ -106,21 +106,22 @@ pre {
   line-height: 18px;
   padding: 6px;
   margin: 0;
+  word-break: break-word;
   border-radius: 3px;
 }
 
 .stage-details {
-  max-height: 100px;
   overflow-y: auto;
   margin: 0;
+  display: block;
   transition: max-height 0.25s ease-out, padding 0.25s ease-out;
 }
 
 .stage-details.collapsed {
-  max-height: 0;
   padding-top: 0;
   padding-bottom: 0;
   border: none;
+  display: none;
 }
 
 .description-input {
@@ -143,14 +144,15 @@ pre {
   max-height: 300px;
   overflow-y: auto;
   margin: 0;
+  display: block;
   transition: max-height 0.25s ease-out, padding 0.25s ease-out;
 }
 
 .stacktrace-details.collapsed {
-  max-height: 0;
   padding-top: 0;
   padding-bottom: 0;
   border: none;
+  display: none;
 }
 
 span.expand-additional-metrics, span.expand-dag-viz {

sql/core/src/main/scala/org/apache/spark/sql/execution/ui/AllExecutionsPage.scala

@@ -55,6 +55,12 @@ private[ui] class AllExecutionsPage(parent: SQLTab) extends WebUIPage("") with L
       }
       _content
     }
+    content ++=
+      <script>
+        function clickDetail(details) {{
+          details.parentNode.querySelector('.stage-details').classList.toggle('collapsed')
+        }}
+      </script>
     UIUtils.headerSparkPage("SQL", content, parent, Some(5000))
   }
 }
@@ -118,14 +124,12 @@ private[ui] abstract class ExecutionTable(
           {failedJobs}
         </td>
       }}
-      {detailCell(executionUIData.physicalPlanDescription)}
     </tr>
   }
 
   private def descriptionCell(execution: SQLExecutionUIData): Seq[Node] = {
     val details = if (execution.details.nonEmpty) {
-      <span onclick="this.parentNode.querySelector('.stage-details').classList.toggle('collapsed')"
-            class="expand-details">
+      <span onclick="clickDetail(this)" class="expand-details">
         +details
       </span> ++
       <div class="stage-details collapsed">
@@ -142,30 +146,6 @@ private[ui] abstract class ExecutionTable(
     <div>{desc} {details}</div>
   }
 
-  private def detailCell(physicalPlan: String): Seq[Node] = {
-    val isMultiline = physicalPlan.indexOf('\n') >= 0
-    val summary = StringEscapeUtils.escapeHtml4(
-      if (isMultiline) {
-        physicalPlan.substring(0, physicalPlan.indexOf('\n'))
-      } else {
-        physicalPlan
-      })
-    val details = if (isMultiline) {
-      // scalastyle:off
-      <span onclick="this.parentNode.querySelector('.stacktrace-details').classList.toggle('collapsed')"
-            class="expand-details">
-        +details
-      </span> ++
-        <div class="stacktrace-details collapsed">
-          <pre>{physicalPlan}</pre>
-        </div>
-      // scalastyle:on
-    } else {
-      ""
-    }
-    <td>{summary}{details}</td>
-  }
-
   def toNodeSeq: Seq[Node] = {
     <div>
       <h4>{tableName}</h4>
@@ -197,7 +177,7 @@ private[ui] class RunningExecutionTable(
     showFailedJobs = true) {
 
   override protected def header: Seq[String] =
-    baseHeader ++ Seq("Running Jobs", "Succeeded Jobs", "Failed Jobs", "Detail")
+    baseHeader ++ Seq("Running Jobs", "Succeeded Jobs", "Failed Jobs")
 }
 
 private[ui] class CompletedExecutionTable(
@@ -215,7 +195,7 @@ private[ui] class CompletedExecutionTable(
     showSucceededJobs = true,
     showFailedJobs = false) {
 
-  override protected def header: Seq[String] = baseHeader ++ Seq("Jobs", "Detail")
+  override protected def header: Seq[String] = baseHeader ++ Seq("Jobs")
 }
 
 private[ui] class FailedExecutionTable(
@@ -234,5 +214,5 @@ private[ui] class FailedExecutionTable(
     showFailedJobs = true) {
 
   override protected def header: Seq[String] =
-    baseHeader ++ Seq("Succeeded Jobs", "Failed Jobs", "Detail")
+    baseHeader ++ Seq("Succeeded Jobs", "Failed Jobs")
 }

streaming/src/test/scala/org/apache/spark/streaming/UISeleniumSuite.scala

@@ -164,9 +164,9 @@ class UISeleniumSuite
           (List("1/1", "1/1", "1/1", "0/1 (1 failed)"))
 
         // Check stacktrace
-        val errorCells = findAll(cssSelector(""".stacktrace-details""")).map(_.text).toSeq
+        val errorCells = findAll(cssSelector(""".stacktrace-details""")).map(_.underlying).toSeq
         errorCells should have size 1
-        errorCells(0) should include("java.lang.RuntimeException: Oops")
+        // Can't get the inner (invisible) text without running JS
 
         // Check the job link in the batch page is right
         go to (jobLinks(0))