theme: oscar - fix auto-submit on language seletion

Signed-off-by: Markus Heiser <markus.heiser@darmarit.de>

searx/templates/oscar/languages.html

@@ -1,12 +1,8 @@
-{% if preferences -%}
-<select class="custom-select form-control" name='language'>
-{%- else -%}
-<select class="time_range custom-select form-control" id='language' name='language'>
-{%- endif -%}
-        <option value="all" {% if current_language == 'all' %}selected="selected"{% endif %}>{{ _('Default language') }}</option>
-        {%- for lang_id,lang_name,country_name,english_name in language_codes | sort(attribute=1) -%}
-                <option value="{{ lang_id }}" {% if lang_id == current_language %}selected="selected"{% endif %}>
-                        {{- lang_name }} {% if country_name %}({{ country_name }}) {% endif %}- {{ lang_id -}}
-                </option>
-        {%- endfor -%}
+<select class="language custom-select form-control" id="language" name="language">
+  <option value="all" {% if current_language == 'all' %}selected="selected"{% endif %}>{{ _('Default language') }}</option>
+{%- for lang_id,lang_name,country_name,english_name in language_codes | sort(attribute=1) -%}
+  <option value="{{ lang_id }}" {% if lang_id == current_language %}selected="selected"{% endif %}>
+    {{- lang_name }} {% if country_name %}({{ country_name }}) {% endif %}- {{ lang_id -}}
+  </option>
+{%- endfor -%}
 </select>