Fix Flip Board View state being reset by layer context menu actions

Fix remapping symbols in legacy schematics

Fix use-after-free crashes during DRC

Speed up opening large library tables in the editor

Reload libraries when changing env vars

Don't throw error on zip/deflate stpz files

Fix conditional physical clearance rules being silently skipped

Fix broken DRC/ERC strings

Count PCM downloads as failed/successful tasks.

Fix netclass colors lost during trace drag in PCB editor

Fix wx assert in track/via properties dialog.

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