Added a ticket search page

Additions

• Search tickets
  • Specify tickets by any available field
  • Keeps specified parameters after form submit
  • Advanced search features
    • Special field for text search in any attachment text field
    • Special field for text search in any ticket text field (subject, content, intervention, comments or attachments)
    • Dates search with dedicated extra options
  • Preset search parameters via URL with /field/value pairs in any order
    • Date field values in URL can be specified as year, date string or date time string
  • Specified parameters will be highlighted to locate them easily
  • A permanent URL for each search will be generated

Improvements

• Allow embedded comment attachments. Befor this update, embedded comments in the create / edit ticket form didn't have any option to attach files to them.

Patches and bugfixes

• Edition of an attachment name and description was not showing or applying changes correctly
• Page titles were not being applied
  • We have added specific title for every ticket list and ticket edition / creation
• Some page titles were wrong

Updated assets

• FontAwesome from 5.7.1 to 5.10.2
• Bootstrap from 4.1.3 to 4.3.1
• Jquery from3.3.1 to 3.4.1
• Select2 from 4.0.8 to 4.0.10
• Summernote from 0.8.10 to 0.8.12
• Codemirror from 5.40.0 to 5.48.4