[SPARK-29453][WEBUI] Improve tooltips information for SQL tab.

[07ARB]

What changes were proposed in this pull request?

Adding tooltip to SQL tab for better usability.

Why are the changes needed?

There are a few common points of confusion in the UI that could be clarified with tooltips. We
should add tooltips to explain.

Does this PR introduce any user-facing change?

yes.

How was this patch tested?

Manual test.

[07ARB]

@srowen , please review this PR, i have modifed code as per your suggestion.#26259

[07ARB]

@srowen , if this PR is ok , then please merge it to master.

[SparkQA]

Test build #4944 has finished for PR 26641 at commit 2df1f20.

• This patch fails Spark unit tests.
• This patch merges cleanly.
• This patch adds no public classes.

[SparkQA]

Test build #4948 has finished for PR 26641 at commit 2df1f20.

• This patch fails Spark unit tests.
• This patch merges cleanly.
• This patch adds no public classes.

[07ARB]

@srowen , Thank you , for your good guidance, your guidance will motivate me to contribute more in spark community.

[07ARB]

I checked failure test cases not related to this PR

[SparkQA]

Test build #4953 has finished for PR 26641 at commit 2df1f20.

• This patch fails Spark unit tests.
• This patch merges cleanly.
• This patch adds no public classes.

[SparkQA]

Test build #4954 has finished for PR 26641 at commit 2df1f20.

• This patch fails Spark unit tests.
• This patch merges cleanly.
• This patch adds no public classes.

[SparkQA]

Test build #4956 has finished for PR 26641 at commit 2df1f20.

• This patch fails Spark unit tests.
• This patch merges cleanly.
• This patch adds no public classes.

[SparkQA]

Test build #4959 has finished for PR 26641 at commit 2df1f20.

• This patch fails Spark unit tests.
• This patch merges cleanly.
• This patch adds no public classes.

[srowen]

Hm, I really can't figure out why those tests are failing. It looks clearly unrelated, but consistent. And I don't see the failure in other PR builds that seem to touch sql/core.

[07ARB]

@srowen ,No problem i will check why it's failing.

[HyukjinKwon]

retest this please

[SparkQA]

Test build #114810 has finished for PR 26641 at commit 2df1f20.

• This patch passes all tests.
• This patch merges cleanly.
• This patch adds no public classes.

[07ARB]

@HyukjinKwon , Thank you

[07ARB]

@srowen , all test passed , i think now it's ok

[srowen]

Merged to master