All files for deployment ready and tested - further development in this repo.

admin/css/unusable_password_field.css

@@ -0,0 +1,19 @@
+/* Hide warnings fields if usable password is selected */
+form:has(#id_usable_password input[value="true"]:checked) .messagelist {
+    display: none;
+}
+
+/* Hide password fields if unusable password is selected */
+form:has(#id_usable_password input[value="false"]:checked) .field-password1,
+form:has(#id_usable_password input[value="false"]:checked) .field-password2 {
+    display: none;
+}
+
+/* Select appropriate submit button */
+form:has(#id_usable_password input[value="true"]:checked) input[type="submit"].unset-password {
+    display: none;
+}
+
+form:has(#id_usable_password input[value="false"]:checked) input[type="submit"].set-password {
+    display: none;
+}