Improve ISSUE_TEMPLATE

Author: jnsh

.github/ISSUE_TEMPLATE.md

@@ -1,14 +1,19 @@
 ### Before submitting
 
-- Make sure you have built the correct theme versions for gtk3, gnome-shell and cinnamon themes.
-- Test whether the issue also appears with default themes (e.g. Adwaita for gtk and gnome). If it does, this often means that the problem should be reported for the application/desktop/tookit in question. Feel free to report the issue here regardless if you're unsure.
+- Ensure that the issue is present with the latest Arc-theme release, or latest git snapshot.
+- Test whether the issue also appears with default themes (e.g. Adwaita for GTK and GNOME).
+- Make sure you have built the correct theme versions for GTK 3, GNOME Shell and Cinnamon themes.
+- Make sure the issue persists between restarts.
+- For GTK 3 related issues, try clearing your user's `~/.config/gtk-3.0/gtk.css`, if it exists.
 
 ### Details
 
-Unless this is a non-visual issue, always add screenshots to help describe your problem.
-
 Please add the following information:
 
-- Distribution and version:
-- Versions for the affected applications/desktops/tookits:
+- Distribution and version.
+- Versions for the affected applications/desktops/tookits.
+- Installation method (package or compiled manually).
+- Arc-theme version.
+
+Unless this is a non-visual issue, always add screenshots to help describe your problem.