[SPARK-3827] Very long RDD names are not rendered properly in web UI

[falaki]

With Spark SQL we generate very long RDD names. These names are not properly rendered in the web UI.

This PR fixes the rendering issue.

[SPARK-3827] #comment Linking PR with JIRA

[JoshRosen]

There are some other JIRAs dealing with long RDD names / table entries due to Spark SQL:

• SPARK-2915: Storage summary table UI glitch when using Spark SQL
• SPARK-3297: SchemaRDD toString with many columns messes up Storage tab display

Does this fix those issues, too? Since it's a CSS fix, maybe it will.

[SparkQA]

QA tests have started for PR 2687 at commit fd06409.

• This patch merges cleanly.

[SparkQA]

QA tests have finished for PR 2687 at commit fd06409.

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

[AmplabJenkins]

Test PASSed.
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[falaki]

@JoshRosen yes this would address both of them.

[falaki]

[SPARK-2915] #comment Linking pull request with JIRA
[SPARK-3297] #comment Linking pull request with JIRA

[JoshRosen]

The names are wrapping properly now:

LGTM, so I'll merge this and also include it in branch-1.1, since it's a small fix. Thanks!