feat: custom time/date format in clock widget (#2180)

* feat: custom time/date format in clock widget

* feat: add customFormat variables for old-imports

* fix: added missing comma for old-import

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Co-authored-by: Meier Lukas <meierschlumpf@gmail.com>

packages/old-import/src/widgets/options.ts

@@ -56,6 +56,8 @@ const optionMapping: OptionMapping = {
     showSeconds: () => undefined,
     timezone: (oldOptions) => oldOptions.timezone,
     useCustomTimezone: () => true,
+    customTimeFormat: () => undefined,
+    customDateFormat: () => undefined,
   },
   downloads: {
     activeTorrentThreshold: (oldOptions) =>