TextInput: Align the text when typing or removing.

Signed-off-by: Augustin Cavalier <waddlesplash@gmail.com>
Closes #13796.

src/kits/interface/TextInput.cpp

@@ -116,6 +116,7 @@ _BTextInput_::KeyDown(const char* bytes, int32 numBytes)
 
 		default:
 			BTextView::KeyDown(bytes, numBytes);
+			AlignTextRect();
 			break;
 	}
 }