Modified panel size is not persisted when dropping at edges.

[garyvh2]

Describe the bug
When you resize a panel one would expect the size or at least the ratio of its size would be kept when positioning other elements surrounding it.

To Reproduce
https://github.com/mathuo/dockview/assets/21265830/f01ddbac-3d4d-4693-95ab-ce80b67b6bdd

Resize a couple of panels on the layout (figure 1.), then drop a panel at the right edge (figure 2.), the sizes panels that were customized are changed to a ratio so all 4 columns have the same size (figure 3.).

Later on on the video you will see I resize the panels again, and when dropping at the edge, this time the ratio of size of the elements customized persist correctly.

Expected behavior
When resizing some panels (figure. 4), and dropping a panel at the edge (figure.5) the sizing of elements that were resized by a user would try to keep a ratio to the customized size when the layout is manipulated (figure 6).

Screenshots
Figure 1. Resized panels

Figure 2. Drop a panel at the edge

Figure 3. Panels size ratio are lost

Figure 4. Resized panels again

Figure 5. Drop a panel at the edge

Figure 6. Panels size ratio is persisted

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