metadata: support multiple filament lengths for prusaslicer

Signed-off-by: Aleksey Frolov <bakatrouble@gmail.com>

moonraker/components/file_manager/metadata.py

@@ -357,9 +357,14 @@ class PrusaSlicer(BaseSlicer):
         return regex_find_max_float(r"G1\sZ(%F)\sF", self.footer_data)
 
     def parse_filament_total(self) -> Optional[float]:
-        return regex_find_float(
-            r"filament\sused\s\[mm\]\s=\s(%F)", self.footer_data
-        )
+        line = regex_find_string(r'filament\sused\s\[mm\]\s=\s(%S)\n', self.footer_data)
+        if line:
+            filament = regex_find_floats(
+                r"(%F)", line
+            )
+            if filament:
+                return sum(filament)
+        return None
 
     def parse_filament_weight_total(self) -> Optional[float]:
         return regex_find_float(