In the Text-editing mode, after inserting a fragment at the end of the sequence, where there is a phosphate, the cursor does not blink

[ViktoriaTkacheva]

Steps to Reproduce

1. Open two Ketcher browser tabs – the Macro mode

2. Add any nucleotide on the canvas

3. Switch to the Sequence mode - the Text-editing mode
   

4. Copy any nucleotide with or without phosphate from another browser tab (for example, Tp or T)

5. Paste it at the end of the sequence

Actual behavior
The cursor does not blink at the end of the sequence

Expected behavior
For consistency, the cursor should blink at the end of the sequence (similar to the case, when the cursor blinks if any fragment is inserted at the end of the sequence, where there is no phosphate)

Screenshots

2024-04-24_14h01_28.mp4

Desktop (please complete the following information):

• OS: Windows 10 Pro (version 22H2) x64
• Browser: Сhrome
• Version: (124.0.6367.60) x64

Ketcher version 2.21.0-rc.1, Build at 2024-04-15; 20:06:01

Issue found while testing #3916

[rrodionov91]

Look's like accidentally fixed. @ViktoriaTkacheva could you please check?