Clarify new behaviour of overhanging wall to user.

part of CURA-12078

resources/definitions/fdmprinter.def.json

@@ -8367,7 +8367,7 @@
                 "wall_overhang_angle":
                 {
                     "label": "Overhanging Wall Angle",
-                    "description": "Walls that overhang more than this angle will be printed using overhanging wall settings. When the value is 90, no walls will be treated as overhanging. Overhang that gets supported by support will not be treated as overhang either.",
+                    "description": "Walls that overhang more than this angle will be printed using overhanging wall settings. When the value is 90, no walls will be treated as overhanging. Overhang that gets supported by support will not be treated as overhang either. Furthermore, any line that's less than half overhanging will also not be treated as overhang.",
                     "unit": "\u00b0",
                     "type": "float",
                     "minimum_value": "0",