Allow users to join their own team's projects

Fix #56

Looked into this for a while, but I think it was simply an oversight in
the logic-as-programmed; if you're part of a team, you should be able
to just click 'join' on any of that team's projects and be a project-member

projects/models.py

@@ -8,7 +8,7 @@ from bugsink.app_settings import get_settings
 
 from compat.dsn import build_dsn
 
-from teams.models import TeamMembership, TeamRole
+from teams.models import TeamMembership
 
 
 class ProjectRole(models.IntegerChoices):
@@ -104,9 +104,8 @@ class Project(models.Model):
         if user is not None:
             # take the user's team membership into account
             try:
-                tm = TeamMembership.objects.get(team=self.team, user=user)
-                if tm.role == TeamRole.ADMIN:
-                    return True
+                TeamMembership.objects.get(team=self.team, user=user)
+                return True
             except TeamMembership.DoesNotExist:
                 pass
 

projects/templates/projects/project_list.html

@@ -137,7 +137,7 @@
                         </div> 
                     {% endif %}
                 {% else %}
-                    {% if project.is_joinable or request.user.is_superuser %}
+                    {% if ownership_filter == "teams" or project.is_joinable or request.user.is_superuser %}{# ownership_filter check: you can always join your own team's projects, so if you're looking at a list of them... #}
                         <div>
                             <button name="action" value="join:{{ project.id }}" class="font-bold text-slate-500 border-slate-300 pl-4 pr-4 pb-2 pt-2 ml-1 border-2 hover:bg-slate-200 active:ring rounded-md">Join</button>
                         </div>