Merge pull request microsoft#4876 from microsoft/seanmcm/0_26_3_release

Seanmcm/0 26 3 release

Update Changelog for MIEngine (microsoft#4858)

* Update Changelog for MIEngine

Update changelog. (microsoft#4825)

Fix bug with Insider installation. (microsoft#4767)

Fix for microsoft#3874 .
This was also causing my previous "downgrade" fix to fail: microsoft#4760

Updating changelog. (microsoft#4750)

Merge pull request microsoft#4689 from microsoft/mimatias/master-26-2

Merge for 0.26.2

Update changelog. Other misc. (microsoft#4659)

correct spelling in changelog (microsoft#4651)

Does not build.  Bypassing checks.

Localization - Translated Strings (microsoft#4591)

Merge pull request microsoft#4500 from microsoft/seanmcm/0_26_1_release2

Fix a missed https-proxy-agent case. (microsoft#4497)