It would be great to be able to turn off case sensitivity for keywords like Element Text Should Be, Wait Until Element Contains, Wait Until Element Does Not Contain, Wait Until Page Contains and Wait Until Page Does Not Contain

This feature was already implemented for Element Should Contain and Element Should Not Contain in #849.

I spent lots of time trying to understand why Wait Until Page Contains fails just to find that it is a case sensitive and case on the screen was displayed differently, because of CSS style: text-transform: lowercase

I would vote to make these keywords case insensitive by default and case sensitive via parameter. I think it would make tests faster to write and less brittle.