Delete and Backspace hotkeys deletes elements under mouse cursor (hover), but not selected ones

[AlexeyGirin]

Steps to Reproduce

1. Put on the canvas following SMILES: CCCCCCCCCCCCCCCCCCCCCCC
2. Select bunch of atoms in the center
   
3. Hover mouse cursor over selected atom
4. Press Del button

Actual behavior
System remove atom under mouse cursor.
Since that moment - pressing DEL button causes nothing

Expected behavior
System removes all selected atoms

Ketcher version [e.g. v2.4.2].

• Indigo Toolkit Version 1.18.0.0-g73c32dec3-wasm32-wasm-clang-12.0.0
• Ketcher Version 2.19.0-rc.2 Build at 2024-03-11; 12:30:30
• Chrome Version Version 122.0.6261.112 (Official Build) (64-bit)
• Win10
• Issue found while testing Expose Fold/Unfold hydrogens function in indigo API Indigo#1436

[ivanmaslow]

The issue is reproducible for all types of elements and it causes multiple problems when trying to delete selected elements using hotkeys (delete or backspace) and when the cursor is on other elements, also there are issues with undo of deletion:

chrome_DLYGfVkDsL.mp4

[Zhirnoff]

The bug has been moved to 2.26 after discussions with the MMPK team and @vanoprenko

[ivanmaslow]

Also, please, take a look at the scenario below during the implementation of the fix, perhaps it's related to this issue, if not - please create an additional task:

1. Add two elements to Canvas (e.g.: arrow and benzene ring):
   
2. Select the first one (e.g.: arrow);
3. Click on Ctrl+C and hold
4. Hover on another element - the whole benzene ring is selected:
   
5. When you hovering, click on Ctrl+V, add an arrow to Canvas - hovering for the whole element is still displayed: