Prateek Sane

created basic status bar. Displays whether editing or viewing. Shows line and column number. adds option to choose to display bar or not

HDFS-17641. Add badly distributed blocks metric

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### Description of PR Add metric BadlyDistrbutedBlocks to the list of metrics which tracks the number of badly distributed blocks in the queue. ### How was this patch tested? Add...

HDFS-17641 .Psane/backport hdfs 17641 to 3.3

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### Description of PR Backporting metrics for Low Redundancy blocks and additional tracked metrics for misreplicated blocks back to 3.3 branch. Requires cherry picks of the following https://github.com/apache/hadoop/pull/7123 https://github.com/apache/hadoop/commit/275c478330d5c8cae3c15b876cc8128d164e9fa0 ###...