Fixes #257

Confirmation and Warning messages when checking out a remote branch - Retry

* Changes direct usages of GUI.enabled to instead use EditorGUI.Begin…
fixes #107 

Fixes to better control when the branch delete button is enabled

Merge branch 'master' into pr/207--changes-direct-usages-of-gui-enabled-to-instead-use-editorgui-begin

Fix script for opening terminal on mac

Terminal.app does not inherit environment variables.
Therefore, expand environmet variables in the script.

Handle exceptions properly on startup

Create temp files in the temp directory

This file was missing for some reason, adding...

Fixes #227

Fixes #228

Fix to include the OwnersDefaultText after user and organizations load

Fix to process error stream async

Adding null check to HistoryView

Fix garbled characters in history view with non-ascii characters (fixes #124)(fixes #35)