Fix auto-applying of top-left positioning in the Cover block BlockAlignmentMatrixControl

[richtabor]

Description

The BlockAlignmentMatrixControl in the Cover block toolbar auto-applies the top-left value to the block each time the control is engaged with. This behavior is unintended, as the control should only apply a new position if the user actively selects one of the matrix points. The current experience leads to unexpected positioning changes, which disrupts user workflows and content layout.

Steps to Reproduce:

1. Add a Cover block to the editor.
2. Add media.
3. Open the "Change content position" control.
4. Observe that the top-left position is auto-applied to the content even without selecting any matrix point.

Expected:

The position should remain unchanged unless the user actively selects a new matrix point.

Visual

CleanShot.2024-11-07.at.10.21.35.mp4

[t-hamano]

I was not able to reproduce this issue.

d2b056917f2f38f12b5ca83505872ad1.mp4

[dhruvang21]

i am also not able to reproduce this issue.

issue-66831.mp4

[richtabor]

I can't either. Doesn't look like anything would have inadvertently resolved this. Let's just close it. Thanks for looking into it!