correct various imports

backups/models/backup.py

@@ -1,7 +1,8 @@
 from django.db import models
 
 from core.models import Category, Weekday
-from inventory.models import Computer, Software
+from inventory.models import Computer
+from softwares.models import Software
 
 from .notification import Notification
 

licenses/models.py

@@ -1,7 +1,7 @@
 from django.db import models
 
 from customers.models import Customer
-from inventory.computer import Computer
+from inventory.models import Computer
 from users.models import User
 from softwares.models import Software
 

users/admin.py

@@ -1,6 +1,6 @@
 from django.contrib import admin
 
-from inventory.models import LicenseWithUser
+from licenses.models import LicenseWithUser
 
 from .models import (
     AdGroup,

users/views.py

@@ -5,7 +5,8 @@ from django.shortcuts import render
 from django_tables2 import RequestConfig
 
 from customers.decorators import customer_view_permission
-from inventory.models import Computer, LicenseWithUser
+from inventory.models import Computer
+from licenses.models import LicenseWithUser
 
 from .decorators import user_view_permission
 from .models import MailAlias