For some reason, layoutwebblocks are special, yet they are not used that way.
Please change that, so there is a proper difference between webblocks and layout-webblocks.
Changing layout-webblock of a page.
This should be simple and fast, yet, I get a dropdownlist of a zillion webblocks which are not layout-webblocks.
heck, even a simple filter, does the webblock has placeholders will reduce the amount of possible webblocks significantly.