Some improvements to Dir File manager.

Components
Dir is an open source material design file explorer application for android.
Proposal
There are a few features which I would like to be added to dir file explorer as it has limited features.
I am suggesting to add two features in Dir file manager.
1)Cleaner
2)Categories in home screen
Below are the screenshots from MI File manager which has these feature enabled:

Catogeries feature in MI file manager:
Cleaner option in MI file manager

Mockups/Examples
I recommend to add these features like below:

1)Cleaner:

2)Categories:

Benefits
1)Cleaner: As the word comes on benefits it has too many benefits. First I will ask you one question that why you keep a cleaner in phone likewise it will protect file manager from different types of viruses .Keeps our phone memory clean from cache or junk files that we don't need in our file manager. So it frees some space for more content.It shows apps that are not installed and if we need them or want to delete.Often sometimes our phone gets bulkydue to caches or thumbnails so we can find them easily in file manager. If this feature is present it will scan your data present in file manager and report you all junk files bulky files virus files and much more.Thus it is very important feature and it should be enabled in Dir file manager.
2)Categories:
This feature leads to easy and simple file browsing. For example if you have to find any video file you will have to browse through all file manager but if you are with this feature you simply have to click on option of videos and you will get list of all videos you are having in your device. Hence this feature has following features:
*It will make home screen good looking.
*It will provide list of all files categorically.
*It leads to fast and simple file browsing.
*No need to waste extra time in the file manager.
*Make OI file manager's screen efficient looking.
Thanks