Improve and cleanup the PR template

.github/PULL_REQUEST_TEMPLATE.md

@@ -1,21 +1,29 @@
 # Description
+Please include a summary of why this pull request should be merged.
 
-Please include a summary of the change and which issue is fixed. Please also include relevant motivation and context.
+<!-- ## Connected issues & other potential problems
 
-Use smart commits here to manipulate issues (eg. Fixes #issue)
+If changes in PR are connected to other issues or are affecting code in other parts of framework
+(e.g. in main package or any other subpackage) make sure to link issue/PR and describe said problem.
 
-## Type of change
+Uncomment this part to add context if needed.
+-->
 
-Please delete options that are not relevant.
+## Type of change
 
-- [ ] Bug fix (non-breaking change which fixes an issue)
-- [ ] New feature (non-breaking change which adds functionality)
-- [ ] Breaking change (fix or feature that would cause existing functionality to not work as expected)
+<!-- 
+- [x] Bug fix (non-breaking change which fixes an issue)
+- [x] New feature (non-breaking change which adds functionality)
+- [x] Breaking change (fix or feature that would cause existing functionality to not work as expected)
+Move/Copy lines that apply out of the comment.
+-->
 
-# Checklist:
+## Checklist:
 
-- [ ] Ran `dart analyze .`
-- [ ] I have performed a self-review of my own code
-- [ ] I have commented my code, particularly in hard-to-understand areas
-- [ ] I have made corresponding changes to the documentation
-- [ ] I have added tests that prove my fix is effective or that my feature works
+<!--
+- [x] Ran `dart analyze` or `make analyze` and fixed all issues
+- [x] Ran `dart format --set-exit-if-changed -l 160 ./lib` or `make format` and fixed all issues
+- [x] I have made corresponding changes to the documentation
+- [x] I have added tests that prove my fix is effective or that my feature works
+Move/Copy lines that apply out of the comment.
+-->