[#1808] Use long month names consistently in ssd templates

[pi-sigma]

Taiga: #1808

• set empty title in PDF templates to prevent duplication of report name in tab
• use long month name in case no reports are found

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (7f74686) 94.79% compared to head (32f9589) 94.79%.

Additional details and impacted files

@@           Coverage Diff            @@
##           develop    #1020   +/-   ##
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  Coverage    94.79%   94.79%           
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  Files          871      871           
  Lines        30557    30557           
========================================
  Hits         28966    28966           
  Misses        1591     1591           

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[stevenbal]

Why was this added?

[pi-sigma]

The title is duplicated in case a new tab is opened for file download (at least on Firefox). Apparently it is not (yet) standardized what browsers do with the title. The <title><title> effectively re-sets whatever the browser does with the title, afterwards we define our custom title. It's a hack, but I don't know a better way to deal with this. Perhaps @jiromaykin has some idea about this. I did however remove the extra head, which was an oversight.

[pi-sigma]

Discussed with Jiro, I'll revert changes and create a separate issue for this because it's an accessibility issue.

[stevenbal]

@pi-sigma is this PR ready for re-review?

[pi-sigma]

@ Steven Yes, this one is ready, forgot to re-request.