Bugs in (7820)

[slawek39]

1. Entering formula 'sin (X) / X' -> F1 in a normal way in Textbook mode generates an error. You have to manually change the position of the left character "'"
2. Instruction isosceles_triangle (GA, GB, 1) draws an isosceles triangle with an angle 1_rad even in degrees mode
3. The Save command in the Note Catalog always copies the first note instead selected.
4. User Keys does not always work properly. For example, if you assign the ł letter under combination User + ALPHA + Shift + L the letter ł will be inserted at a position other than the cursor in the Note Editor and the Program Editor.