Merging branch 'frontend' into main. UI updated, application works end-to-end and allows creation of the translator file.

merged updated backend into frontend, sanity check of file and form load, form update and save on update

step 1

allowed file load from users machine, added toolbar action icons, indicators for file load and form save

Shorten and correct text if binary objects are shortened

- shape should always be filled

plan next steps

- sections reordered
- all 3-test cases work

- can be given by user, _ separated
- xml find

Find streak searches to the end of this section

Entropy calculation limited to 1024 points

Plot can also plot images

Add test of emi- image

- improve findAscii
- fill also removes too short data: shorted by other function
- cleaned and updated testBackend.sh