Improved find and navigate to file capabilities in IDE

[vitaliy-guliy]

Improved Navigate to file popup:

• window borders and buttons have been removed
• added scroll bars to the popup with suggestions

Changelog

Improve find and navigate to file capabilities in IDE

Release Note:

• Added to release not in enhancements section

[TylerJewell]

Super cool. Thanks for making the title change requested.

Let's crosslink a matching docs issue and a release notes continent from PM into this PR.

[slemeur]

@vitaliy-guliy : here are some feedbacks

Then:

• I'd like to know how this behave if you zoom in / use Che in a small window.
• We are displaying the complete path to the file. What is the mecanism you are using when the path is very long and cannot be displayed entirely on the screen? Should we truncate the text in some ways or show only the parts of it ?

[slemeur]

The description of the PR is not detailed enough.

You need to explain what are the changes that you did to this popup in order to improve it.

[codenvy-ci]

Build # 1689 - FAILED

Please check console output at https://ci.codenvycorp.com/job/che-pullrequests-build/1689/ to view the results.

[slemeur]

@vitaliy-guliy I created the following doc issue: https://github.com/codenvy/che-docs/issues/74

[slemeur]

@vitaliy-guliy : we need you to work on the doc issue first. We will then be able to quickly edit the release note here:
https://docs.google.com/document/d/1cEbq32s9J2ygEfGd4d1ImvT3c7YZqfAbRL0PMC8HE48/edit#

[vitaliy-guliy]

I recorded a video of the behavior when resizing
https://youtu.be/y6W9QwGul1s

[vitaliy-guliy]

According to @slemeur feedback

• the rounded box on the popup is removed
• added more space on the left and right of the proposals box

[vitaliy-guliy]

For now we display the complete file path and truncate it when there is not enough space to display.
This is an easiest way to display it. Displaying the part of the path is more complex due to it's difficult to forecast how the browser will render the table with proposals.

[codenvy-ci]

Build # 1704 - FAILED

Please check console output at https://ci.codenvycorp.com/job/che-pullrequests-build/1704/ to view the results.

[codenvy-ci]

Build # 1755 - FAILED

Please check console output at https://ci.codenvycorp.com/job/che-pullrequests-build/1755/ to view the results.

[slemeur]

added to release note and updated title