updates to several panels to account for a lack of heater_bed

ks_includes/printer.py

@@ -234,6 +234,10 @@ class Printer:
     def get_tool_number(self, tool):
         return self.tools.index(tool)
 
+    def has_heated_bed(self):
+        if "heater_bed" in self.devices:
+            return True
+
     def section_exists(self, section):
         if section in self.get_config_section_list():
             return True