fix(custom-text): Don't trim custom text (@Leonabcd123) (monkeytypegame#7170)

### Description

Removed the `.trim()` call that deleted leading and trailing literal
tabs or newlines from custom text.

This is to make sure that no matter what the custom text is, it will
always stay the same after updating it. The current problem is that
leading and trailing tabs and newlines will be removed when you click on
"change" and "ok" for the second time (because they're now in their
literal form, not \t and \n).

Author: Leonabcd123

frontend/src/ts/modals/custom-text.ts

@@ -269,7 +269,7 @@ function cleanUpText(): string[] {
 
   if (text === "") return [];
 
-  text = text.normalize().trim();
+  text = text.normalize();
   // text = text.replace(/[\r]/gm, " ");
 
   //replace any characters that look like a space with an actual space