Pdf printing

[dave-mills]

This PR fixes the pdf print for the initiatives page (fixes #78, fixes #109). It also updates the print formatting for that page.

• The faint rendering was caused by the CSS classes .animated.fadeIn in the main template - the browsershot was being taken immediately upon load, at which point the fade in animation was not complete.
• I fixed this with some custom css in _print-tweaks.scss.
• I also updated the layout to make the pdf slightly nicer.
• Finally, the pdf is now saved before being downloaded in the browser. This will let us modify the file name.

There is still an issue where we cannot modify the pdf file in the ways that we should with Browsershot and Puppeteer - e.g. page orientation, page margins etc. But that is less of a concern now.

TODO:

• [x] pass in the initiative information to the pdf generation, so we can name the file based on the initiative name.
• [x] add automatic cleaning to remove generated pdf files once per week.

[dan-tang-ssd]

Got latest code and performed testing in local env. I manually created the "prints" folder in C:\public\aec\storage\app\prints. PDF file has been generated with visible content. But browser returns error 404, while the pdf file is existed.

Screen shots:

Click Generate PDF button

Error occured

I manually created the "prints" folder in C:\public\aec\storage\app\prints

Try again

Returns error 404

PDF file is generated

PDF file content is visible, it also shows the radar chart now

[dave-mills]

Returns error 404

Fixed :)

[dan-tang-ssd]

It works now, looks very nice.