[Feature] Add uploading bar on zappl

Components

The main compenents which i am talking about is the section where we get to create post or zap and submit to the community

Proposal

I am proposing to add uploading bar with percentage.Since whenever i upload a picture or anything on zappl i can't get when the file is uploaded or it got ever uploaded or not

Mockups / Examples

Benefits

1. New Uploading information
2. People with slow internet won't find a problem
3. It looks more good and looks professional