Validation of uploaded file while uploading image or any other file

[pranav1698]

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• [x] bug report
• [ ] feature request
• [ ] support request => Please do not submit support requests here, instead ask your query in out Gitter channel at https://gitter.im/fossasia/meilix

Actual Behaviour The Upload Wallpaper option selects any file in your local machine without validating about the file type or about the size

Expected Behaviour Any upload file option should first validate what type of file it wants and also about the size of file.

Other information:

Your operating system

Ubuntu Would you like to work on the issue? Yes

[pranav1698]

[tabesin]

See also #107