Fix entry cursor animation

[fpabl0]

Description:

This PR is based on the chat call (12/02/2021) and the discussion on #1779.

Cursor should be static when user is interacting with the Entry.
#1778 appears, because fade animation is running when user is typing.

#1956 should be landed first to avoid memory leaks.

Fixes #1778

Checklist:

• Tests included.
• Lint and formatter run with no errors.
• Tests all pass.
• Fixes animation runner memory leak #1956 landed

[PresleyHank]

when I container.NewVSplit then I click the maximize window button, and then click Restore, the interference line of the table will appear in the MultiLineEntry，How to fix it ,thanks you time.：）

---

tabVSplitEntry := container.NewVSplit(
	table1,
	multiLineEntry1,
)

---

I have tried as follows:
table1.Refresh()
multiLineEntry1.Refresh()

But the Interference line still appear

[andydotxyz]

Please open a new issue for this @PresleyHank

[andydotxyz]

Sorry for the delay on merging the dependency, I think this is unblocked now @fpabl0.

[fpabl0]

Sorry for the delay on merging the dependency

No worries :)

I think this is unblocked now

Yes, it is 👍