Had a couple usability tweaks for the Blueprint editor.
There’s a number of occasions where you change your mind about which node to use. Typically this involves hunting down and reconnecting lines, but in many cases, such as for math operator nodes and the like, there’s 1:1 compatibility with the inputs so simply being able to use the right click menu to bring up the node context menu and replace the node in place makes the most sense.
In cases where the inputs/type is not compatible, this still removes the step of needing to delete the old node. In the case of connection incompatibility when the user selects a new node, the old would be deleted and the new would be placed at the same location, but unconnected. If the user exits the menu without choosing a node, no changes are made.
It would also be a big time saver to be able to drag-insert nodes on exec lines between two other nodes. Normally, inserting a node between two other nodes requires at least three operations: breaking the exec line, connecting it to the new node, and then connecting the new node to the next node in line. In addition, it is typical that the exec line reaches beyond the scope of what can be seen on one screen so panning may also be required a few times.
Drag-insert for exec nodes reduces that down to one user operation and eliminates a couple common errors that can easily be introduced doing it the current way (Failing to remove the first exec line when adding the new node, and reconnecting the node incorrectly).
In cases with multiple exec outputs, the first output would have preference.
