fix: missing edit icon on new features page for user editable features

[afeedhshaji]

Overview:

Added a new property to chromedash-feature-table that now takes in editableFeatures along with other existing props like starredFeatures etc. When rendering the rows for the table, this property will be used to decide if the user can edit the feature or not (along with the existing check if user has "all edit" permissions)

Fixes #3569

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[DanielRyanSmith]

After testing these changes, features now selectively show which can be edited by the user on the new features page. Great job! Thanks for the fix.

[afeedhshaji]

@DanielRyanSmith Can we merge this? (I see there are some merge conflicts. Happy to resolve it)

[jrobbins]

Let's not change the pencil icons right now. Our plan is to phase them out and remove the page that they link to. Users already have an "Edit fields" button to make edits.