add more group setting messages & fix leaving empty groups & fix image cropper default zoom

webroot/blah/en-us.json

@@ -256,6 +256,9 @@
     "history.visible": "enabled",
     "history.hidden": "disabled",
     "group.history.changed.by": "{0} changed history visibility to: {1}",
+    "group.name.changed.by": "{0} changed the group name to {1}",
+    "group.pfp.changed.by": "{0} changed the group icon",
+    "group.pfp.removed.by": "{0} removed the group icon",
     "prompt.are.you.sure": "Are you sure?",
     "title.unknown.group": "Unknown Group",
     "title.unknown": "Unknown",

webroot/blah/pl-pl.json

@@ -255,6 +255,9 @@
     "history.visible": "włączona",
     "history.hidden": "wyłączona",
     "group.history.changed.by": "{0} zmienił widoczność historii na: {1}",
+    "group.name.changed.by": "{0} zmienił(a) nazwę grupy na: {1}",
+    "group.pfp.changed.by": "{0} zmienił(a) ikonę grupy",
+    "group.pfp.removed.by": "{0} usunął(ęła) ikonę grupy",
     "prompt.are.you.sure": "Czy na pewno?",
     "title.unknown.group": "Nieznana grupa",
     "title.unknown": "Nieznany",