updated images with properly centered images

MVMCoreUI/SupportingFiles/Media.xcassets/icon_tracker_incomplete.imageset/Contents.json

@@ -2,17 +2,17 @@
   "images" : [
     {
       "idiom" : "universal",
-      "filename" : "Group.png",
+      "filename" : "Empty state icon.png",
       "scale" : "1x"
     },
     {
       "idiom" : "universal",
-      "filename" : "Group@2x.png",
+      "filename" : "Empty state icon@2x.png",
       "scale" : "2x"
     },
     {
       "idiom" : "universal",
-      "filename" : "Group@3x.png",
+      "filename" : "Empty state icon@3x.png",
       "scale" : "3x"
     }
   ],

MVMCoreUI/SupportingFiles/Media.xcassets/icon_tracker_invalid.imageset/Contents.json

@@ -2,17 +2,17 @@
   "images" : [
     {
       "idiom" : "universal",
-      "filename" : "Group 2.png",
+      "filename" : "Alert icon.png",
       "scale" : "1x"
     },
     {
       "idiom" : "universal",
-      "filename" : "Group 2@2x.png",
+      "filename" : "Alert icon@2x.png",
       "scale" : "2x"
     },
     {
       "idiom" : "universal",
-      "filename" : "Group 2@3x.png",
+      "filename" : "Alert icon@3x.png",
       "scale" : "3x"
     }
   ],