I think you can still do it, but perhaps not in as precise of a manner as we would like.
Any of the themes that have a main "background box" are done with an image fill on the layout part, which is sliced for the different parts - left, middle, right, etc. Select the layout part (left side bar in layout mode), then look at your appearance inspector. You can move the slice lines a bit, which should allow you to move the left side to account for the record indicator. It's a bit finicky, and I don't see a way to enter it numerically (3 pixels) - you just have to slide the line over.
I did a little testing and it seems to work, but you have to move each part - header, body, footer. I had some weird stuff happening on the left side with the alternating fill color in list view… so maybe turn that off.
Hope that helps!
One can hope that the indicator problem will be fixed in the next version of FM.
Thanks both, for these suggestions. Shawn - although your suggestion has led to me learning much more about slicing etc. (and thanks for that), I think it will be too fiddly to be practicable on the number of layouts that I have. So I'm going to go with Josh's optimism, and keep my fingers crossed that FM fix the annoyance!
Yes, it is "too fiddly" - I agree. I was glad when it was pointed out to me, to know that it is there… it's nice to know how it is working its magic a bit under the hood, but I do wish we had more granular control over theme stuff, and numeric control of image slices.
Another option I have seen is to add a 3px graphic element along the left side of your FORM view layouts, mimicking the indicator bar of list view, and move all of your form view items to the right 3 pixels, rather than moving your list view items to the left 3 pixels.
I wasn't at DevCon, so I don't know what the crystal ball holds… but the list view indicator issue has been around for some time. I guess I'm not holding my breath that it will be resolved in FM13. If they do, I hope they do it in a way that won't mess up all of our layouts if we have been moving things 3 pixels.
Never mind… I shouldn't post so early.
That method won't move the theme background slice stuff… still have to fiddle with that. Sorry!
I need to get some coffee!!!