Right click to search should respect session setting of current tab

[darkdh]

Did you search for similar issues before submitting this one?
Yes
Describe the issue you encountered:
Right click on the select text and right click it to search or search image in private tab and the new search result tab will not be private. Same behavior in session tab.
Expected behavior:
The new tab should be private or same session according to the original tab.

• Platform (Win7, 8, 10? macOS? Linux distro?):
  All
• Brave Version:
  0.11.6
• Steps to reproduce:
  1. Open a private tab/session tab and navigate to any website contain text or image.
  2. Right click to search text or search image
  3. The search result tab is in default session.