[ZEPPELIN-975] Move download data button outside the paragraph settings

[corneadoug]

What is this PR for?

Following the PR #714 and its comments, we are moving the download data outside the paragraph settings. Which would allow a possible drop down to choose backend data download in the future.

What type of PR is it?

Improvement

What is the Jira issue?

https://issues.apache.org/jira/browse/ZEPPELIN-975

How should this be tested?

Show a %Table type of result (you can use below code in a paragraph for that).
You should see the icon, click on it to download the data.

print(s"""%table
name\tsize
sun\t127.6
moon\t0.6458
gerard\t45.234856803""")

Screenshots (if appropriate)

Questions:

• Does the licenses files need update? No
• Is there breaking changes for older versions? No
• Does this needs documentation? No, but maybe feature announcement during release

[corneadoug]

CI fail not related:

Failed tests: 
  SparkParagraphIT.testSqlSpark:162 Paragraph from SparkParagraphIT of testSqlSpark status: 
Expected: "FINISHED"
     but: was "ERROR"
  SparkParagraphIT.testSqlSpark:169 Paragraph from SparkParagraphIT of testSqlSpark result: 
Expected: "age\njob\nmarital\neducation\nbalance\n30 unemployed married primary 1,787\nage\njob\nmarital\neducation\nbalance"
     but: was "Table not found: bank; line 1 pos 14\nset zeppelin.spark.sql.stacktrace = true to see full stacktrace"

[corneadoug]

Merging if there is no more discussion