chore: renamed `get_program` api functions

- `get_program` is renamed to `get_program_and_enrollment_status`
- `get_program_detail` is renamed to `get_program`
- Minor code improvements
diff --git a/erpnext/education/utils.py b/erpnext/education/utils.py
index 5aaaa2f..7a61ae5 100644
--- a/erpnext/education/utils.py
+++ b/erpnext/education/utils.py
@@ -89,7 +89,7 @@
 		else:
 			return None
 
-def get_program(program_name):
+def get_program_and_enrollment_status(program_name):
 	program = frappe.get_doc('Program', program_name)
 	is_enrolled = bool(get_program_enrollment(program_name)) or check_super_access()
 	return {'program': program, 'is_enrolled': is_enrolled}
diff --git a/erpnext/public/js/education/lms/pages/ProgramPage.vue b/erpnext/public/js/education/lms/pages/ProgramPage.vue
index 3f3a0f7..2a13661 100644
--- a/erpnext/public/js/education/lms/pages/ProgramPage.vue
+++ b/erpnext/public/js/education/lms/pages/ProgramPage.vue
@@ -35,7 +35,7 @@
 	},
 	methods: {
 		getProgramDetails() {
-			return lms.call('get_program_details', {
+			return lms.call('get_program', {
 				program_name: this.program_name
 			});
 		},
diff --git a/erpnext/www/lms.py b/erpnext/www/lms.py
index dc3b671..801d766 100644
--- a/erpnext/www/lms.py
+++ b/erpnext/www/lms.py
@@ -34,7 +34,7 @@
 def get_featured_programs():
 	featured_program_names = frappe.get_all("Program", filters={"is_published": True, "is_featured": True})
 	if featured_program_names:
-		featured_list = [utils.get_program(program['name']) for program in featured_program_names]
+		featured_list = [utils.get_program_and_enrollment_status(program['name']) for program in featured_program_names]
 		return featured_list
 	else:
 		return get_all_programs()[:2]
@@ -43,18 +43,15 @@
 def get_all_programs():
 	program_names = frappe.get_all("Program", filters={"is_published": True})
 	if program_names:
-		program_list = [utils.get_program(program['name']) for program in program_names]
+		program_list = [utils.get_program_and_enrollment_status(program['name']) for program in program_names]
 		return program_list
-	else:
-		return None
 
 @frappe.whitelist(allow_guest=True)
-def get_program_details(program_name):
+def get_program(program_name):
 	try:
-		program = frappe.get_doc('Program', program_name)
-		return program
-	except:
-		return None
+		return frappe.get_doc('Program', program_name)
+	except frappe.DoesNotExistError:
+		frappe.throw(_("Program {0} does not exist.".format(program_name)))
 
 # Functions to get program & course details
 @frappe.whitelist(allow_guest=True)