When I am reviewing a list of ideas and I promote one to a feature. I usually click on the feature link within the idea to put it where it should go, tag it, move it to our ticketing system and then work the next idea. Since you made the feature link take me to a new page instead of loading up a new window in the side slider I have to either use the back button or re-navigate to my idea list to work the next idea. At this point it is just annoying I have to use the back button to get where I need to be when I used to be able to just work out of the side slider.
Can you tell us which page you are on? Ideas and promoted features should open in a side drawer view (as opposed to bringing you to a new page)