Localization support

Localization support. Finnish language added as a second language for the system. Also fixed an issue that could have shown direct error messages to the end users.

Needs testing before merge

src/tjts5901/templates/view.html

@@ -17,11 +17,11 @@
         <div class="col-md-8">
             <h5 class="mb-1">{{ item.title }}</h5>
             <p class="mb-1">{{ item.description }}</p>
-            <p class="mb-1">Created : {{ item.created_at }}</p>
-            <p class="mb-1">Current bid : {{ current_price|localcurrency }}</p><br/>
+            <p class="mb-1">{{ _("Created : ")}}{{ item.created_at }}</p>
+            <p class="mb-1">{{ _("Current bid : ")}}{{ current_price|localcurrency }}</p><br/>
             <form method="POST" action="{{ url_for('views.bid', id=item.id)}}" class="row" enctype="multipart/form-data">
                 <input class="col-md-6" id="bid" name ="bid" type="number" min="{{ min_bid }}" placeholder="write your bid">
-                <button for="bid" type="submit" class="btn btn-primary col-md-3">Validate </button>
+                <button for="bid" type="submit" class="btn btn-primary col-md-3">{{ _("Validate")}}</button>
             </form>
             <small class="form-text text-muted">
                 {{ _("Minimum bid is %(min_bid)s", min_bid=min_bid|localcurrency) }}