Add link to Channel Bridge from Rate Calendar

Hopefully this is a simple addition, now that I'm using the Rate Calendar for 100% of my rate & min night settings, I could save a mouse click if there was a link directly in the Rate Calendar page.

And for anyone not familiar with where to go next after changing rates/min nights it will be a nice way to guide them to the correct place to push rates. The first few times I used it I had to poke around until I found the place.