Add a "Download All" button to download all matched samples

[ITAYC0HEN]

Description
When executing a Yara from the interface, there is no way to download all the matched samples. Instead, the user needs to manually click each sample, or use the undocumented API.

I suggest adding two buttons for both the job and the Recent pages.

• A button to download all samples in a zip (protected with "infected" password)
• A dropdown button of buttons to download a text file
  • Download the names of the files
  • Download the SHA256 of the files
  • Download the SHA1 of the files
  • Download the MD5 of the files

Related: #16

[msm-code]

Still missing filenames. I don't see myself using this feature often, but I'll create a separate issue for it.