I have released an editor only plugin to fix/add some of the missing features, like you can bind a bunch of Level Editor and Asset events, get the mouse position in the level editor etc.
Its something until Epic add proper support for this kinda stuff
For more info check out the thread, the githubpage or ElgSoft.com
Level Editor events that are exposed in the plugin are:
OnLevelActorAdded, OnLevelActorDeleted, OnLevelActorAttached, OnLevelActorDetached, OnActorMoved,
OnActorSelectionChanged, OnActorSelected, OnActorDeselected, OnWorldAdded, OnWorldDestroyed,
OnMapOpened, OnMapChanged, OnEditorModeChanged, OnEnterMode, OnExitMode, OnEditorCameraMoved,
OnFocusViewportOnActors, OnBeginPIE, OnPausePIE, OnResumePIE, OnEndPIE, OnBeginStandaloneLocalPlay,
OnLeftMouseClick, OnMiddleMouseClick, OnRightMouseClick, OnInputKey.
Asset events that are exposed are:
OnAssetCreated, OnAssetRemoved, OnAssetRenamed, OnAssetSelectionChanged, OnAssetSelected, OnAssetDeselected