more help strings

src/components/style_switcher/style_switcher.js

@@ -166,15 +166,21 @@ export default {
         }
         // Admin downgraded FE
         if (themeEngineVersion > CURRENT_VERSION) {
-          return noActionsPossible
-            ? 'downgraded_theme'
-            : 'downgraded_theme_missing_snapshot'
+          return t(pre + 'fe_downgraded') + ' ' +
+            (
+              noActionsPossible
+                ? t(pre + 'migration_snapshot_ok')
+                : t(pre + 'migration_snapshot_gone')
+            )
         }
         // Admin upgraded FE
         if (themeEngineVersion < CURRENT_VERSION) {
-          return noActionsPossible
-            ? 'upgraded_theme'
-            : 'upgraded_theme_missing_snapshot'
+          return t(pre + 'fe_upgraded') + ' ' +
+            (
+              noActionsPossible
+                ? t(pre + 'migration_snapshot_ok')
+                : t(pre + 'migration_snapshot_gone')
+            )
         }
       }
     },

src/i18n/en.json

@@ -400,10 +400,14 @@
         "use_snapshot": "Keep as is",
         "help": {
           "v2_imported": "File you imported was made for older FE. We try to maximize compatibility but there still could be inconsitencies.",
+          "future_version_imported": "File you imported was made in newer version of FE.",
+          "older_version_imported": "File you imported was made in older version of FE.",
           "snapshot_present": "Theme snapshot is loaded, so all values are overriden. You can load theme's actual data instead.",
           "snapshot_missing": "No theme snapshot was in the file so it could look different than originally envisioned.",
-          "future_version_imported": "File you imported was made in newer version of FE.",
-          "older_version_imported": "File you imported was made in older version of FE."
+          "fe_upgraded": "PleromaFE's theme engine upgraded after version update.",
+          "fe_downgraded": "PleromaFE's version rolled back.",
+          "migration_snapshot_ok": "Just to be safe, theme snapshot loaded. You can try loading theme data.",
+          "migration_napshot_gone": "For whatever reason snapshot was missing, some stuff could look different than you remember."
         }
       },
       "common": {