web: preferences: incomplete-dir (#2183)

* web: preferences: incomplete-dir

This minor change adds an option to enable/disable/set the folder for
downloads in progress via the web interface preferences dialog.

web/src/prefs-dialog.js

@@ -212,6 +212,24 @@ export class PrefsDialog extends EventTarget {
     const download_dir = input;
 
     let cal = PrefsDialog._createCheckAndLabel(
+      'incomplete-dir-div',
+      'Use temporary folder:'
+    );
+    cal.check.title =
+      'Separate folder to temporarily store downloads until they are complete.';
+    cal.check.dataset.key = 'incomplete-dir-enabled';
+    cal.label.title = cal.check.title;
+    root.append(cal.root);
+    const incomplete_dir_check = cal.check;
+
+    input = document.createElement('input');
+    input.type = 'text';
+    input.dataset.key = 'incomplete-dir';
+    root.append(input);
+    PrefsDialog._enableIfChecked(input, cal.check);
+    const incomplete_dir_input = input;
+
+    cal = PrefsDialog._createCheckAndLabel(
       'autostart-div',
       'Start when added'
     );
@@ -282,6 +300,8 @@ export class PrefsDialog extends EventTarget {
       download_dir,
       download_queue_check,
       download_queue_input,
+      incomplete_dir_check,
+      incomplete_dir_input,
       root,
       stop_idle_check,
       stop_idle_input,