Add an issue template for crashers

Better to have separate templates than a large, "choose your own
adventure" one.

.gitlab/issue_templates/Bug.md

@@ -23,17 +23,14 @@
 
 ## Version information
 <!--
- - which version of GTK+ you are using
- - what operating system and version
-  - for Linux, which distribution
- - if you built GTK+ yourself, the list of options used to configure the build
+ - Which version of GTK+ you are using
+ - What operating system and version
+  - For Linux, which distribution
+ - If you built GTK+ yourself, the list of options used to configure the build
 -->
 
 ## Additional information
 <!--
- - If the bug was a crash, the exact text that was printed out
-   when the crash occurred.
- - If the bug was a crash, attaching a stack trace obtained using
-   GDB is appreciated; follow the instructions on the wiki:
-   https://wiki.gnome.org/Community/GettingInTouch/Bugzilla/GettingTraces
--->
+ - Screenshots or screen recordings are useful for visual errors
+ - Please report any warning or message printed on the terminal
+-->

.gitlab/issue_templates/Crash.md

@@ -0,0 +1,34 @@
+## Steps to reproduce
+
+ 1. ...
+ 2. ...
+ 3. ...
+
+<!--
+  You should try and reproduce with the demos applications available
+  under the `demos` directory, or the test programs in the `tests` directory.
+  Alternatively, please attach a *small and self-contained* example that
+  exhibits the issue.
+-->
+
+## Version information
+<!--
+ - Which version of GTK+ you are using
+ - What operating system and version
+  - for Linux, which distribution
+ - If you built GTK+ yourself, the list of options used to configure the build
+-->
+
+## Warnings
+<!--
+ - If the application generates warning messages before crashing please
+   report them here
+-->
+
+## Backtrace
+<!--
+ - Attaching a stack trace obtained using GDB is appreciated; follow the
+   instructions on the wiki:
+
+   https://wiki.gnome.org/Community/GettingInTouch/Bugzilla/GettingTraces
+-->