Fix/fix crash on close all data

Needs lidarview-core!367 (merged)

Fix crash on close all data (ctrl + w) by refactoring onClose method from applogic, and use LVCore C++ method instead.

requested review from @gatien.ferret

assigned to @timothee.couble

added 1 commit

• 4617520b - [submodule] Bump LVCore

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mentioned in commit b7129451

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