Use hints instead of placeholders in URL fields

Placeholders are hard to read due to their low contrast, and users might
want to read them after they're already gone, and so they cause both
accessibility and usability issues.

app/components/admin/budget_phases/form_component.html.erb

@@ -51,7 +51,7 @@
     </div>
 
     <div class="small-12 column">
-      <%= translations_form.text_field :main_link_url, placeholder: t("admin.shared.example_url") %>
+      <%= translations_form.text_field :main_link_url, hint: t("admin.shared.example_url") %>
     </div>
   <% end %>
 

app/components/admin/budgets/form_component.html.erb

@@ -21,9 +21,10 @@
           <%= translations_form.text_field :main_link_text %>
         </div>
       </div>
+
       <div class="row expanded">
         <div class="small-12 medium-9 large-6 column end">
-          <%= translations_form.text_field :main_link_url, placeholder: t("admin.shared.example_url") %>
+          <%= translations_form.text_field :main_link_url, hint: t("admin.shared.example_url") %>
         </div>
       </div>
     <% end %>

config/locales/en/admin.yml

@@ -1369,7 +1369,7 @@ en:
       show_results_and_stats: "Show results and stats"
       results_and_stats_reminder: "Marking these checkboxes the results and/or stats will be publicly available and every user will see them."
       close_modal: Close modal
-      example_url: "https://consulproject.org"
+      example_url: "For example, https://consulproject.org or /help"
     geozones:
       index:
         title: Geozone

config/locales/es/admin.yml

@@ -1368,7 +1368,7 @@ es:
       show_results_and_stats: "Mostrar resultados y estadísticas"
       results_and_stats_reminder: "Si marcas estas casillas los resultados y/o estadísticas serán públicos y podrán verlos todos los usuarios."
       close_modal: Cerrar ventana emergente
-      example_url: "https://consulproject.org"
+      example_url: "Por ejemplo, https://consulproject.org o /help"
     geozones:
       index:
         title: Zonas