Reduce numerous and costly map finds in mesh fetch pipeline as well as one extremely expensive map key usage that was pointless

This reverts commit 964b8554.

This reverts commit e01b8b98.

This reverts commit 74288100.

This reverts commit dd782497.

This reverts commit 32cf7894.

This reverts commit e1bf5b07.

This reverts commit f6ba7b06.

This reverts commit 2f964c0a.

This reverts commit a3f771d5.

This reverts commit b659eb25.

This reverts commit 0430171a.

This reverts commit c5d84f03.

This reverts commit eb819116.

This reverts commit 4d88f18c.

[FIXED] @setenv_XXX commands affect the local rather than edit environment when @setenv restricted and @setenv_daycycle was issued