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Co-authored-by: liuzhe <zhe.liu@microsoft.com>

Co-authored-by: Lijiao <15910218274@163.com>

Co-authored-by: Lijiao <15910218274@163.com>

Co-authored-by: Lijiao <15910218274@163.com>

As requirement of #2390 , removed multiphase from WebUI, document, and put all trials flatten on WebUI.

1. The major change is to split trial-jobs to trials in webui, and use parameter id as part of trial id.
2. If multiphase is enabled, the limitation of trial controls job count only, not trials actually.
3. When multiphase enabled, the trial status may not be right. Previous trials in a job will be marked as success, only last trial presents the job's status.
4. multiphase related documents and UX are removed.

minor changes,
1. Update dev document for webui development.

Add shell support for ssh connection, so that remote script can be started with user environment.

Minor fixes,

1. Fix gpu_metrics_collector to support pyenv. As pyenv will create one more process, so that original pgrep code always got extra processes, and cannot start gpu_metrics_collector.
2. Fix NASUI failure on dev-install-node-modules, to create subfolder every time.
3. Fix MakeFile to reduce mis-created links, and other minor issues.
4. Add node --watch for nni_manager for better dev experience.

Bumps [acorn](https://github.com/acornjs/acorn) from 6.4.0 to 6.4.1.
- [Release notes](https://github.com/acornjs/acorn/releases)
- [Commits](https://github.com/acornjs/acorn/compare/6.4.0...6.4.1

)
Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

* support final result is NaN in webui

* delete unuseful change

* show NaN rather than NaN(latest)
Co-authored-by: Lijiao <15910218274@163.com>

* add warning message when final data illegal

* update

* update

* update

* fix comments
Co-authored-by: Lijiao <15910218274@163.com>

* rename intermediate graph xAxis name

* rename intermediate name

* code format

* rename class name
Co-authored-by: Lijiao <15910218274@163.com>

Co-authored-by: Lijiao <15910218274@163.com>

Remove final val in the intermediate result graph and fix layout style bug(table | search space | config) on desktop (#2111)

* fix bug of !(object) !(number) metris

* fix comments
Co-authored-by: Lijiao <35484733+lvybriage@users.noreply.github.com>

Co-authored-by: Lijiao <35484733+lvybriage@users.noreply.github.com>

[WebUI] Support dictionary metrics includes table defatule metirc | addcolumn | intermeidate result modal (#2073)