If no parameter is provided in add_content.php -> use title as "Add New Content"
Use tags to identify menu in navigation
Access navigation in assoc array-like behaviour
Implement set select link
Fix submit form link
Add special character encode
Add store and rearrange some elements
Merge remote-tracking branch 'remotes/origin/master' into form
Add tenant field's constant
Merge branch 'form' of https://github.com/makemek/cms into form
Add ability to fetch data from  'set' data type
Add category and fix description form
Implement upload thumbnail
Thumbnail as a class
Add ability to upload thumbnail to the server
Refactor & create CRUD interface