Update issue templates

.github/ISSUE_TEMPLATE/design-change.md

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+---
+name: Design change
+about: What do you want to change?
+title: ''
+labels: design-change
+assignees: ''
+
+---
+
+Larger than a feature request, this type of issue is for describing a proposed change to how Kaleidoscope works, in advance of a draft PR.
+
+What do you want to change?
+
+How will it make Kaleidoscope better?
+
+What trouble might users have in adapting to the new functionality?
+
+What trouble might developers have in adapting to the new functionality?