Preview: Text above reaction arrow ignores margins when atoms are added

[Zhirnoff]

Steps to Reproduce

1. Copy and Paste on canvas

$RDFILE 1
$DATM    11/05/24 15:07
$RFMT
$RXN

 -INDIGO- 1105241507

  2  1
$MOL

  -INDIGO-11052415072D

  1  0  0  0  0  0  0  0  0  0999 V2000
    7.6474   -4.4514    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0
M  END
$MOL

  -INDIGO-11052415072D

  1  0  0  0  0  0  0  0  0  0999 V2000
    7.3724   -6.9764    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0
M  END
$MOL

  -INDIGO-11052415072D

  1  0  0  0  0  0  0  0  0  0999 V2000
    9.9974   -5.7764    0.0000 N   0  0  0  0  0  0  0  0  0  0  0  0
M  END

$DTYPE Name
$DATUM Agrsthtyjyil9op98p90i6yrtrwwr6u579po9
$DTYPE Reference
$DATUM Not available
$DTYPE Reaction Conditions
$DATUM Agrsthtyjyil9op98p90i6yrtrwwr6u579po9

Actual behavior
Text above reaction arrow ignores margins when atoms are added

Expected behavior
The text should maintain proper margins above the arrow, with sufficient spacing as described in requrements.

Screenshots

Desktop:

• OS: Windows 11
• Browser Chrome
• Version 128.0.6613.120 (Official Build) (64-bit)

Ketcher version
[Version 2.26.0-rc.7]
Indigo version
[Version 1.27.0-dev.1]

Bug foun while pre-testing: #2559

[ivanmaslow]

The fix is successfully verified on aws_ci SA env with Ketcher-master and Indigo-2404-ket-to-rdf branches:

• Ketcher [Version 2.28.0-dev.1] Build at 2024-11-20; 19:58:39;
• Indigo Version 1.27.0-dev.1.43-gec603913-wasm32-wasm-clang-12.0.0
• Desktop, Windows 11 Enterprise
• Chrome Version 131.0.6778.86 (Official Build) (64-bit)

Reaction's name and conditions are displayed correctly after save/load to/from RDF or layout actions:

Also, looks like it could fix #2610, but length of spine becomes bigger