GitHub user guoxiaolongzte opened a pull request:
https://github.com/apache/spark/pull/20818
[SPARK-23675][WEB-UI]Title add spark logo, use spark logo image
## What changes were proposed in this pull request?
Title add spark logo, use spark logo image. reference other big data system
ui, so i think spark should add it.
spark fix before:

spark fix after:

reference kafka ui:

reference storm ui:

reference yarn ui:

reference nifi ui:

reference flink ui:

## How was this patch tested?
manual tests
Please review http://spark.apache.org/contributing.html before opening a
pull request.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/guoxiaolongzte/spark SPARK-23675
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/20818.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #20818
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commit 964439be7a592b2a94f93008dabc45a18f97c3c6
Author: guoxiaolong <guo.xiaolong1@...>
Date: 2018-03-14T07:04:00Z
[SPARK-23675][WEB-UI]Title add spark logo, use spark logo image
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