Issue #3485185 by ivnish: Change manual currency field to number

Related to #3485185

src/Form/CurrencySettingsForm.php

@@ -101,8 +101,10 @@ class CurrencySettingsForm extends ConfigFormBase {
 
     foreach ($countries as $key => $name) {
       $form["usd_manual_$key"] = [
-        '#type' => 'textfield',
+        '#type' => 'number',
         '#title' => $this->t("Manual @name to USD currency rate", ['@name' => $name]),
+        '#min' => 0,
+        '#step' => 0.01,
         '#default_value' => $this->state->get("rcr.usd_manual_$key") ?: '',
         '#states' => [
           'visible' => [