Forever-repeating, synced task creates hundred entries

[kajak-556]

Workflow
I am syncing tasks between Mozilla Thunderbird <-> Nextcloud <-> DAVx5 <-> jtx Board.

Now, if creating a Task in Thunderbird with "Repeat": "Forever", and syncing it, jtx Board creates 100 entries for this task and per default display all entries until year 2124 in the list - a tad too much foresight 😉.

Problem
According to #1363 this behavior is technically correct and corresponds to creating a yearly jtx Board task with 100 occurrences. But default decision to display all items in task list seems not ideal. I also cannot filter tasks to be only displayed, if at max x days/months/year in future.

Ideas/questions

1. Maybe set a better default display behavior for (possibly synced) recurring, infinitely repeated tasks?

2. Create a "Start within ..." under "Start(ed)" category of "Filter" , which allows to display e.g. all tasks with a start date of max. one year in future?

3. [BUG] Recurrent task appears as multiple tasks. #1363 (comment) states

   "In your case you can still activate the option to show only the next upcoming task from the menu."

   Where exactly can I find this setting?

Thanks!

Related: #309