Update issue templates

.github/ISSUE_TEMPLATE/bug_report.md

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+---
+name: Bug report
+about: Create a report to help us improve
+
+---
+
+**Describe the bug**
+A clear and concise description of what the bug is.
+
+**To Reproduce**
+Steps to reproduce the behavior:
+1. Go to '...'
+2. Click on '....'
+3. Scroll down to '....'
+4. See error
+
+**3D Model and Slic3r Configuration Export**
+Please upload a ZIP archive containing a copy of the 3D model you are seeing this bug with and a CTRL-E export of the configuration used.
+
+**Expected behavior**
+A clear and concise description of what you expected to happen.
+
+**Screenshots**
+If applicable, add screenshots to help explain your problem.
+
+**Desktop (please complete the following information):**
+ - OS: [e.g. MacOS, Linux, Windows]
+ - Version [e.g. 1.3.0]
+     - _Do not report Prusa3D Slic3r bugs here without confirming it is a problem on a development release of Slic3r, or your issue will be closed. *Only* use normal Slic3r version IDs._
+     - _For -dev versions, use `git describe --tag` or get the hash value for the version you downloaded or `git rev-parse HEAD`_
+     - _Use `About->About Slic3r` for release versions._
+
+**Additional context**
+Add any other context about the problem here.

.github/ISSUE_TEMPLATE/feature_request.md

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+---
+name: Feature request
+about: Suggest an idea for this project
+
+---
+
+**Is your feature request related to a problem? Please describe.**
+A clear and concise description of what the problem is. Ex. I'm always frustrated when [...]
+
+**Describe the solution you'd like**
+A clear and concise description of what you want to happen.
+
+**Describe alternatives you've considered**
+A clear and concise description of any alternative solutions or features you've considered.
+
+**Additional context**
+Add any other context or screenshots about the feature request here.