grep links for test names with dots "." don't get escaped correctly.

Steps to Reproduce:

Create a test whose suite name contains a dot, for example "crud-behavior-basic.html"
Navigate to the test page, for example: http://localhost:5000/test/index.html
Click on the link to "crud-behavior-basic.html"

Expected result: Link reduces the tests to be run to those inside crud-behavior-basic.html file. Generated link has: grep=crud-behavior-basic.html

Actual result: No tests are run. Generated link has: grep=crud-behavior-basic%5C.html