Move the entity class comment into its own box.

Blender doesn't support multiline text or word wrapping, so the tooltips
were rather ugly. The double spacing used by layout.label() is still a
little ugly, but the resulting text box just below the entity classname is
much more usable.

tools/io_qfmap/entity.py

@@ -94,8 +94,8 @@ def qfentity_items(self, context):
     entclasses = qfmap.entity_classes.entity_classes
     eclist = list(entclasses.keys())
     eclist.sort()
-    enum = (('', '--', 'No class. Will be exported as part of the world entity.'),)
-    enum += tuple(map(lambda ec: (ec, ec, entclasses[ec].comment), eclist))
+    enum = (('', "--", ""),)
+    enum += tuple(map(lambda ec: (ec, ec, ""), eclist))
     return enum
 
 class QFEntityProp(bpy.types.PropertyGroup):
@@ -151,6 +151,20 @@ class EntityPanel(bpy.types.Panel):
         flags += ("!easy", "!medium", "!hard", "!dm")
         row = layout.row()
         row.prop(qfentity, "classname")
+        box=layout.box()
+        for l in ec.comment.split("\n"):
+            if not l:
+                continue
+            words = l.split(" ")
+            line = ""
+            while words:
+                if len(line) + len(words[0]) > 40:
+                    box.label(line)
+                    line = ""
+                line += (line and " " or "") + words[0]
+                del words[0]
+            if line:
+                box.label(line)
         row = layout.row()
         for c in range(3):
             col = row.column()