Partially reverts2250b5cefe
. Removing the user count and fake user count icons was controversial (which was expected) and there are a few further changes needed, that won't make it in time for the release, see D9946. While there is a design to bring back the user count and fake user indicators, a new design idea was proposed that the UI team wants to follow. This came too late for the 2.92 release, the new design is targeted at the 2.93 release now. Meanwhile, UI team decision was to simply revert the design changes. The new design is being worked on in https://developer.blender.org/T84669. Note that this commit does not revert some internal changes done in2250b5cefe
. Namely the introduction of `ed_util_ops.c` and data-block operators in there. These will still be needed in the new design.