Add if to check if $ is globally used

[Rulox]

• What kind of change does this PR introduce? (Bug fix, feature, docs update, ...) Bug fix
• What is the current behavior? (You can also link to an open issue here) If we want to use jQuery globally (to use an exernal plugin for example), gravity forms are not rendered
• What is the new behavior (if this is a feature change)? We check if we are using "$" variable in window, and render the html in a different way.
• Does this PR introduce a breaking change? (What changes might users need to make in their application due to this PR?) No
• Other information: