Fix: disable the storyview scroll in the "Open" tab

[BurningTreeC]

This PR adds a variable tv-disable-storyview-scroll that, if set, disables the scrolling to the target element.
This is useful in the sidebar's "Open" tab for example, where under certain circumstances it can cause the sidebar to scroll when opening a new tiddler or the control panel

Opening a tiddler in the story-river makes the storyview navigate to that tiddler.
At the same time there's a storyview in the "Open" tab and also there a navigation occurs but it should not.

This PR fixes this issue

[github-actions]

Confirmed: BurningTreeC has already signed the Contributor License Agreement (see contributing.md)

[BurningTreeC]

to reproduce:

• go to tiddlywiki.com
• change the sidebarlayout to fixed-fluid
• close the ControlPanel
• open the dev tools
• go to the Inspector
• add the attribute dir="rtl" to the html element
• open the "Open" sidebar tab
• open the ControlPanel again or a New Tiddler
• see how the sidebar scrolls

to compare, here's a build with this PR:
https://tv-disable-storyview-scroll.tiddlyhost.com/

[BurningTreeC]

This fixes also the behavior of scrollIntoView in Chromium browsers (should we use scrollIntoView in the future for the pageScroller) - where a scrollIntoView stops the previous scrollIntoView ... so if we scrolled the ControlPanel into view and had the sidebar's "Open" tab open, the story-river wouldn't scroll to the ControlPanel (or just a bit)

[BurningTreeC]

@Jermolene - can we consider this?

[saqimtiaz]

@BurningTreeC I am struggling to understand the purpose of this PR despite having read the top post twice. Can you please provide a description of the problem that this is meant to fix?

[BurningTreeC]

@BurningTreeC I am struggling to understand the purpose of this PR despite having read the top post twice. Can you please provide a description of the problem that this is meant to fix?

I've updated the description

[BurningTreeC]

@Jermolene - could we consider this PR?

[Jermolene]

Hi @BurningTreeC it's too late for inclusion in v5.3.6, I'm afraid.

I would like to fix the problem that the PR tackles – the symptom that I have run into in the past has been that the animation of the "open" tab interrupts that of the story river.

The impact of this PR is quite broad so I would like to give it more consideration for the next release.