Layout fix in filter form

observations/templates/observations/index.html

@@ -51,10 +51,10 @@
                     </select>
             </div>
             <div class="form-group">
-                    <select name="cropCategoryId" id="cropCategoryList" class="form-control chosen-select" data-placeholder="{% trans "Crop categories" %}">	
+                    <select name="cropCategoryId" id="cropCategoryList" style="min-width: 150px;" class="form-control chosen-select" data-placeholder="{% trans "Crop categories" %}">	
                     </select>
             </div>
-            <button type="submit" class="btn btn-default">{% trans "Filter" %}</button>
+            <button type="submit" class="btn btn-primary">{% trans "Filter" %}</button>
         </form>
 <div class="table-responsive">
             <table class="table table-striped" id="observationTable">