🪲 Dont try translating program with blanks (#5854)

Fixes the problem by checking if the program has blanks before trying to translate it. Also, I changed the in-site calculation if a program was modified, for the flag that comes from the DB

Fixes #5833 

**How to test**

* Log in as student3 and then go to level 1 and execute this program
```
print Welcome to Hedy's restaurant 🍟
_ What would you like to order?
echo So you would like to order
print Thank you for your order!
print It's on its way!
echo So you would like to order
print Thank you for your order!
print It's on its way!
echo So you would like to order
print Thank you for your order!
print It's on its way!
```
* Now log in as teacher1, change your keyword language to anything other than English and go check the program uploaded by student1, it should work normally.

app.py

@@ -1877,12 +1877,15 @@ def view_program(user, id):
         result['username']) else None
 
     code = result['code']
-    if result.get("lang") != "en" and result.get("lang") in ALL_KEYWORD_LANGUAGES.keys():
+    # if the snippet has blanks, it'll fail in the translation process
+    # so we just dont translate it if it has any
+    has_blanks = hedy.location_of_first_blank(code) > 0
+    if not has_blanks and result.get("lang") != "en" and result.get("lang") in ALL_KEYWORD_LANGUAGES.keys():
         code = hedy_translation.translate_keywords(code, from_lang=result.get(
             'lang'), to_lang="en", level=int(result.get('level', 1)))
     # If the keyword language is non-English -> parse again to guarantee
     # completely localized keywords
-    if g.keyword_lang != "en":
+    if not has_blanks and g.keyword_lang != "en":
         code = hedy_translation.translate_keywords(
             code,
             from_lang="en",

website/for_teachers.py

@@ -285,7 +285,7 @@ def get_grid_info(self, user, class_id, level):
                 name = adventure_names.get(program['adventure_name'], program['adventure_name'])
                 customized_level = class_adventures_formatted.get(str(program['level']))
                 if next((adventure for adventure in customized_level if adventure["name"] == name), False)\
-                        and self.is_program_modified(program, adventures, teacher_adventures):
+                        and program.get('is_modified'):
                     student_adventure_id = f"{student}-{program['adventure_name']}-{level}"
                     current_adventure = self.db.student_adventure_by_id(student_adventure_id)
                     if not current_adventure: