Improve issue templates

* Add template for other issues so it doesn't look like bug reports and
  feature requests are the only options
* Encourage users to read the README before filing issues
* Clarify that issues about specific operating systems and tooling are out
  of scope

.github/ISSUE_TEMPLATE/bug_report.md

@@ -1,12 +1,30 @@
 ---
 name: Bug report
-about: Create a report to help us improve
+about: Report an existing feature not working as designated
 title: ''
 labels: bug
 assignees: ''
 
 ---
 
+**Before reporting, please have a look at "[Known bugs and workarounds](https://github.com/Martchus/syncthingtray/blob/master/README.md#known-bugs-and-workarounds)".**
+
+Note that I cannot support all operating systems, their flavors and different
+tooling you might be using (Anti Virus scanners, GNU/Linux desktop environments,
+AUR helpers, …). So please avoid filing bug reports specific to them and contact
+the respective vendors instead.
+
+Note that adaptions for newer versions of certain platforms (or for completely
+new platforms) would be *feature requests* and **not** bugs. So for instance,
+making Syncthing Tray work under an updated/new GNU/Linux desktop environment
+should be filed as a feature request and *not* a bug report.
+
+Note that I will likely have to reject bug reports about Wayland-specific
+problems due to limitations of that protocol which I cannot workaround from my
+side.
+
+---
+
 **Relevant components**
 * [ ] Standalone tray application (based on Qt Widgets)
 * [ ] Plasmoid/applet for Plasma desktop
@@ -17,7 +35,7 @@ assignees: ''
 
 **Environment and versions**
 * Versions of `syncthingtray`, `qtutilities` and `c++utilities`: …, …, …
-* Qt version: 5.….…
+* Qt version: ….….…
 * C++ compiler (name and version): …
 * C++ standard library (name and version): …
 * Operating system (name and version): …

.github/ISSUE_TEMPLATE/feature_request.md

@@ -2,11 +2,26 @@
 name: Feature request
 about: Suggest an idea for this project
 title: ''
-labels: feature  request
+labels: feature request
 assignees: ''
 
 ---
 
+**Please browse through the [README](https://github.com/Martchus/syncthingtray/blob/master/README.md) before asking a question.**
+Maybe what you've been asking is already implemented
+or a known limitation with a documented workaround.
+
+Note that I cannot support all operating systems, their flavors and different
+tooling you might be using (Anti Virus scanners, GNU/Linux desktop environments,
+AUR helpers, …). So please avoid filing feature requests specific to them and
+contact the respective vendors instead.
+
+Note that I will likely have to reject feature reports about Wayland-specific
+behavior due to limitations of that protocol which I cannot workaround from my
+side.
+
+---
+
 **Relevant components**
 * [ ] Standalone tray application (based on Qt Widgets)
 * [ ] Plasmoid/applet for Plasma desktop

.github/ISSUE_TEMPLATE/other_issue.md

@@ -0,0 +1,42 @@
+---
+name: Other issue
+about: Ask a question or file an issue that doesn't fit into the other categories
+title: ''
+labels:
+assignees: ''
+
+---
+
+**Please browse through the [README](https://github.com/Martchus/syncthingtray/blob/master/README.md) before asking a question.**
+Most likely your question is already answered.
+Before asking questions about the AUR package, please read the [pinned comment
+on the AUR](https://aur.archlinux.org/packages/syncthingtray#comment-568348).
+
+Note that I cannot give concrete help for all operating systems, their flavors
+and different tooling you might be using (Anti Virus scanners, GNU/Linux desktop
+environments, AUR helpers, …). So if you want concrete advice about those you
+must ask the respective vendors instead.
+
+---
+
+**Relevant components**
+* [ ] Standalone tray application (based on Qt Widgets)
+* [ ] Plasmoid/applet for Plasma desktop
+* [ ] Dolphin integration
+* [ ] Command line tool (`syncthingctl`)
+* [ ] Integrated Syncthing instance (`libsyncthing`)
+* [ ] Backend libraries
+
+**Is your feature request specific to a certain platform/environment? Please specify.**
+
+**Is your feature request related to a problem? Please describe.**
+A clear and concise description of what the problem is. Eg. 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.