fix: several bugs and improvement ideas for education module #18599 (#18600)

* Update student_report_generation_tool.py

bug fix

* Update student_applicant.json

* Update program_course.json

* Update course_activity.json

erpnext/education/doctype/course_activity/course_activity.json

@@ -30,7 +30,7 @@
    "in_global_search": 0,
    "in_list_view": 0,
    "in_standard_filter": 0,
-   "label": "Enrollment",
+   "label": "Course Enrollment",
    "length": 0,
    "no_copy": 0,
    "options": "Course Enrollment",

erpnext/education/doctype/program_course/program_course.json

@@ -5,6 +5,7 @@
  "engine": "InnoDB",
  "field_order": [
   "course",
+  "course_name",
   "required"
  ],
  "fields": [
@@ -16,6 +17,14 @@
    "label": "Course",
    "options": "Course",
    "reqd": 1
+  },
+   {
+   "fieldname": "course_name",
+   "fieldtype": "Data",
+   "in_list_view": 1,
+   "label": "Course Name",
+   "fetch_from": "course.course_name",
+   "read_only":1
   },
   {
    "default": "0",

erpnext/education/doctype/student_applicant/student_applicant.json

@@ -705,7 +705,6 @@
    "bold": 0, 
    "collapsible": 0, 
    "columns": 0, 
-   "default": "INDIAN", 
    "fieldname": "nationality", 
    "fieldtype": "Data", 
    "hidden": 0, 

erpnext/education/doctype/student_report_generation_tool/student_report_generation_tool.py

@@ -55,7 +55,7 @@ def preview_report_card(doc):
 			"courses": courses,
 			"assessment_groups": assessment_groups,
 			"course_criteria": course_criteria,
-			"letterhead": letterhead.content,
+			"letterhead": letterhead and letterhead.get('content', None),
 			"add_letterhead": doc.add_letterhead if doc.add_letterhead else 0
 		})
 	final_template = frappe.render_template(base_template_path, {"body": html, "title": "Report Card"})