Minor changes#33

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asterd wants to merge 6 commits intobpillon:masterfrom

Commits on Oct 13, 2021

- add parameter to block update on set/add items to enable the possibility to make some calculations on clustered markers
ddurzo
committed

Commits on Jan 21, 2022

Commits on Feb 10, 2022

- add an overlapping algorithm to manage same-point locations
ddurzo
committed

Commits on Feb 19, 2022

- minor improvements to base library to fix some position/view issues
ddurzo
committed

Commits on Feb 21, 2022

- other minor improvements in clustering
ddurzo
committed