Current edit action has following issues

Moved the edit icon to the glyph margin making it consistent with our quick fix behavior. This helps in fixing layout issues with this icon.

• Display the edit icon in settings with a small delay
• dropdown decorator only works for first setting with multiple settings on a single line
• action decoration in settings file makes it hard to put cursor at end of line
• Settings: Edit icon off by a few pixels
• Clicking edit icon in editable settings.json scrolls horizontally
• New settings "copy to settings" drop down is clunky
• "Copy to Settings" overwrites existing value
• "edit" button for settings not discoverable