[FEATURE] Move to the end and beginning of the text using the End and Home keys

[FreshL1me]

Is your feature request related to a problem? Please describe.
When editing a message, you may need to go to the beginning/end of the text. To do this, you need to either press the left mouse button at the beginning/end of the text (which takes a lot of time, since you need to move the mouse and try to get there), or hold down ctrl + left/right arrows.

Describe the solution you'd like
Pressing the Home and End keys should move the text cursor to the beginning and end of the text, respectively.