Cursor navigation inconsistency in custom columns

[StatusQuo]

Hi,

I found a confusing inconsistency in cursor movement
(using standard behaviour SpecialCursorMovement=0, so cursor_left/right should activate the command line).

To reproduce:
Define a (new) custom columns view
- with only columns "Name" and "Extension" in it (any other being small enough to fit the window without horizontal scrollbar will also do),
- activate the option "Horizontal scrollbar" in its definition.
- Then adjust the column widths to use exactly the maximum possible space without showing a vertical scroll bar.

• In Full view (Ctrl+F2):
  • cursor_left/right activates the command line (OK).
• In Custom Columns Mode:
  • cursor_left/right activates the command line, if there is no vertical scroll bar (OK).
  • cursor_left/right moves the cursor 1 line up/down, if there is a vertical scroll bar (:arrow: wrong).

(I just assigned left/right keys to cm_FocusCmdLine as a workaround, waiting for side-effects...)

[Edit] Second workaround: As the above workaround prevents horizontal scrolling,
I now decreased the column size of "Name" by 1 pixel, this also helps.

[ghisler(Author)]

The reason for this behaviour: If you define a horizontal scrollbar, TC will try to scroll it when you use the left/right arrow keys, even if it isn't available.

[StatusQuo]

Well, TC obviously does not try to scroll after shortening the columns by 1 pixel.
This (bad) behaviour only occurs when exactly the maximum size of the listbox is used by the existing columns.

[Edit] Additionally:
With an existing horizontal scrollbar, cursor keys left/right normally scroll the window left/right.
So IMO moving the cursor up/down is always the wrong reaction to cursor keys left/right in custom columns view, isn't it?

[StatusQuo]

2ghisler(Author)

So IMO moving the cursor up/down is always the wrong reaction to cursor keys left/right in custom columns view, isn't it?

How do you think about this?