New: Improve help text for extra file importing

frontend/src/Settings/MediaManagement/MediaManagement.js

@@ -204,7 +204,10 @@ class MediaManagement extends Component {
                             <FormInputGroup
                               type={inputTypes.TEXT}
                               name="extraFileExtensions"
-                              helpText="Comma separated list of extra files to import, ie sub,nfo (.nfo will be imported as .nfo-orig)"
+                              helpTexts={[
+                                'Comma separated list of extra files to import (.nfo will be imported as .nfo-orig)',
+                                'Examples: ".sub, .nfo" or "sub,nfo"'
+                              ]}
                               onChange={onInputChange}
                               {...settings.extraFileExtensions}
                             />

frontend/src/Store/Selectors/createSeriesLanguageProfileSelector.js

@@ -5,7 +5,7 @@ function createSeriesLanguageProfileSelector() {
   return createSelector(
     (state) => state.settings.languageProfiles.items,
     createSeriesSelector(),
-    (languageProfiles, series) => {
+    (languageProfiles, series = {}) => {
       return languageProfiles.find((profile) => {
         return profile.id === series.languageProfileId;
       });