Refactored the way input fields are rendered to allow further customization

and easier support of custom fields like OffsetDateTime (#7).

src/main/resources/templates/fragments/forms.html

@@ -90,13 +90,13 @@
 									<option th:value="${op}" th:each="op : ${field.getType().getCompareOperators()}" 
 										th:text="${op.getDisplayName()}">
 								</select>
-								<input placeholder="NULL" th:type="${field.getType().getHTMLName()}" 
-										name="filter_value" 
-										class="form-control w-50" th:id="|__id_${field.getName()}|"
-										th:classAppend="${field.isPrimaryKey() && object != null ? 'disable' : ''}"
-										th:required="${!field.isNullable() && !field.isPrimaryKey()}"
-										step="any"
-										>
+								<input th:replace="~{fragments/inputs :: 
+									__${field.getFragmentName()}__(
+											field=${field}, 
+											create=${create}, 
+											name='filter_value',
+											value=''
+										)}"></input>
 							</th:block>
 							<button class="ui-btn btn btn-primary"><i class="bi bi-search text-white"></i></button>
 						</div>