During Text Selection, Scrolling Occurs Too Rapidly Near Keyboard

### Expected
When starting a text selection near the keyboard, text selection should still allow for precision.

### Observed
Scrolling occurs too rapidly when selecting text near the keyboard, making precise selection near-impossible.

### Reproduced
1. Create a note with many lines of text.
2. Select text right above the keyboard.
3. Attempt to just select two lines of text — the one above the keyboard and one below.

https://user-images.githubusercontent.com/42454301/110802803-870f8a00-824c-11eb-8e0d-c153e3887d66.MP4

Make|Model|iOS Version|App Version
-|-|-|-
Apple|iPhone 11 Pro |iOS 14.4|4.33

Start by reproducing the selection behavior described on an iPhone near the keyboard, using the linked video and the iOS 14.4 details as reference. The issue names no source file or test; done means selecting text around the keyboard scrolls slowly enough to select the intended two lines precisely.

Written by the indexing model from the issue text.