Search does not affect cursor position in caret mode

[tomak-git]

Configuration:

• Web browser and its version: Firefox 50.1.0
• Operating system and its version: Ubuntu 16.04
• PDF.js version: default

Steps to reproduce the problem:

1. Open a web page with text
2. Search for a string of text
3. Enter caret mode

Result: cursor is positioned at the place of search hit -- this is the expected behavior.

Do all of the above with a pdf (in pdf.js): cursor position is not affected by search.

Use case: if this worked as expected, it would allow for text selection in pdfs without needing a mouse.