libobs: Change service max res. to res. list

(This commit also modifies rtmp-services and UI)

Changes the maximum resolution size to a resolution list, and splits the
maximum FPS to its own function.

(Note: ABI has not been modified because the last changes still haven't
been released yet, so it's safe to modify this as long as the changes
haven't been officially released)

plugins/rtmp-services/data/package.json

@@ -1,10 +1,10 @@
 {
 	"url": "https://obsproject.com/obs2_update/rtmp-services",
-	"version": 151,
+	"version": 160,
 	"files": [
 		{
 			"name": "services.json",
-			"version": 151
+			"version": 160
 		}
 	]
 }

plugins/rtmp-services/data/services.json

@@ -477,8 +477,11 @@
             "recommended": {
                 "keyint": 2,
                 "profile": "main",
-                "max width": 1280,
-                "max height": 720,
+                "supported resolutions": [
+                    "1280x720",
+                    "852x480",
+                    "480x360"
+                ],
                 "max fps": 30,
                 "max video bitrate": 6000,
                 "max audio bitrate": 128