Add bwdif deinterlace option

src/strings/en-gb.json

@@ -1475,6 +1475,7 @@
     "PathNotFound": "The path could not be found. Please ensure the path is valid and try again.",
     "YadifBob": "YADIF Bob",
     "Yadif": "YADIF",
+    "Bwdif": "BWDIF",
     "Track": "Track",
     "Season": "Season",
     "ReleaseGroup": "Release Group",

src/strings/en-us.json

@@ -1546,6 +1546,7 @@
     "XmlTvSportsCategoriesHelp": "Programs with these categories will be displayed as sports programs. Separate multiple with '|'.",
     "Yadif": "YADIF",
     "YadifBob": "YADIF Bob",
+    "Bwdif": "BWDIF",
     "Yes": "Yes",
     "Yesterday": "Yesterday",
     "PathNotFound": "The path could not be found. Please ensure the path is valid and try again.",