File upload functionality breaks when dealing with larger size files

[shubhit7]

Large File Upload Fails

Describe the bug
File upload of larger file size, say >2GB, fails after sometime.

To Reproduce
Steps to reproduce the behavior:
Try to upload a file of size >2GB, upload process starts but crashes after some time.

Expected behavior
File should be uploaded successfully.

Additional context
IMHO, the file should be uploaded in chunks.

cockpit-navigator/navigator/components/FileUpload.js

Lines 115 to 126 in cf7910c

	slice_file(file) {
	var offset = 0;
	var next_offset;
	var chunks = [];
	this.num_chunks = Math.ceil(file.size / this.chunk_size);
	for (let i = 0; i < this.num_chunks; i++) {
	next_offset = Math.min(this.chunk_size * (i + 1), file.size);
	chunks.push(file.slice(offset, next_offset));
	offset = next_offset;
	}
	return chunks;
	}

This code splits the files in chunks but stores all the chunks in an array, which is ultimately present in the memory.
Hence, when dealing with larger file size, this code may crash.
I would suggest, to read to file in chunks rather than storing chunks of whole file in array.