In QGIS 3.0 and 2.18 there is apparently a limited number of bookmarks, that can be stored. It is a limit of 250 bookmarks per project. I find bookmarks great for an in-project team coomunication and I need to change that limit somehow, as we reached it. Made a lot of how-to research and didn't found anything similar. The only path I found possible is to change "something" in the Advanced Settings Editor.
Does someone know how to change the limit of possible bookmarks in a QGIS project?