Handle missing neighbor data when switching to another element

Closes #879 (closed)

It seems this was a rare race condition in which only a portion of an if statement got evaluated before the Vuex store changed, causing the rest of the if to still cause a TypeError. JS is incredibly unreliable. This switches to a null-ish operator, which hopefully should be executed in one go and not broken up by some async code.

assigned to @erwanrouchet

changed the description

requested review from @babadie

added 3 commits

• 7d754e78...a528f152 - 2 commits from branch master
• ec4f1a10 - Handle missing neighbor data when switching to another element

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enabled an automatic merge when the pipeline for ec4f1a10 succeeds

merged

mentioned in commit 0b2122de