Components
Kolab Notes is the open source note taking app, which makes it possible to sync your notes with Kolab and IMAP server in the Kolab v3 storage format. I noticed that the app lacks the sort by format feature
Proposal
I will propose that the sort by format tab should be added to the kolab notes app by its developers as it will help sort notes by the formats they were saved and created by users.
Mockups / Examples
This is how the feature will be applied if its implemented 
Benefits
It will help the users of the kolab notes app sort their notes according to the formats the notes were entered and stored. This feature is going to be good for those that have much notes and in different formats as this feature will categorize them into various format. For example all pdf will be stacked together etc likewise the rest of the text formats.
Posted on Utopian.io - Rewarding Open Source Contributors