jimmy andrews 7e1b8e46d9 add concept of saving-on-clear/restoring the selection manager's selection, so that tools can restore the before-tool selection if the tool is cancelled, or if the tool otherwise did not change the underlying meshes. ...

+ add a callback to the modeling editor mode so it can know whether a tool was cancelled, and make the modeling mode use the selection manager's new save-on-clear/restore feature automatically when its tools are cancelled.

 + make some tools (normals, tangents, inspector) restore the before-tool-start selection after tool use via a utility function, since they shouldn't change mesh IDs that the selection relies on.

#jira UE-195948
#rb Ryan.Schmidt

[CL 29027037 by jimmy andrews in ue5-main branch]

2023-10-23 22:46:23 -04:00

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