get global, current project and target project properties id/value pairs separated

When user tries moving a task to other project, the selects now show id/value pairs of global, current project, and target project if there would be invalid task values stored unchanged. Gives the user a chance to change to allowed ids/values when moving a task between projects (without copying the task)

in database to integer 0 because field os_id is currently defined with NOT NULL

set just a basic translation of optgroups for most selects when moving a task to other project

fix FS#2134 adapt selects when moving task to other project

Allow setting real_name and jabber_id durung setup for the first user

see FS#2478

Setupadmin

put globalversions, currentprojectversions and targetversions into select optgroups when moving task to other project

move task logic

updated by using https://cgit.drupalcode.org/jstools/tree/jscalendar/lib/lang/calendar-bg.js
as original jscalendar from dynarch not available anymore.

and hopefully fix a weird issue with left/right text and "  (i can't read hebrew, but make the file at least working :-) )

content-type http header was set 2 times - once wrong as as html, and later xml.

not needed as there is calendar-zh.js file for utf-8

Translated these new strings:
- invalidtasktype
- invalidtargetproject
- globaloptions

Translated new strings

which is required for jscalendar to load the russian translation file (or it loads the en version of jscalendar translation strings)
I put it at beginning to make more clear it is more important than other translations.

to make the jscalendar work when macedonian is detected (guest users) or choosen (user setting)

just a stub based on english version. Used currently for both sr (cyrillic) and sr_lat (latin).

no difference for end user, but better http status codes in webserver log and browser webdevtools than status 500..

fix response http status codes for some ajax request

means it is maybe a bit slower, but loading 100k complete task test data for example into array for example might hit php memory limit

Added rules for Visual Studio Code

bcc: instead to: when more than one recipient in a notification

as this is the better approach and browsers can help/react to missing form entries before submitting forms (without extra js or css classes)

also replaced some translations
<?php echo Filters::noXSS(L('string')); ?>
with  
<?= eL('string') ?>
which is doing the same, but shorter and makes templates more readable (IMHO)

Drop ie8 stuff

This is the job of CSS, you can use :required , :invalid,  :before,  :after pseudo classes for theming it.

and tooltip info that it is not changeable by himself (with FS#2322 'Mention System' in mind, mention @username in task descriptions and comments, so @username should be quite static.)

The button with text was too prominent beside the search input field.

so that the button is not so prominent (or maybe someone has better layout ideas?)

smaller tasklist export button

Created italian setup translation

on current debian(stretch) 
apt-get install php
installs the php7, so adapted the example.

adapted from https://github.com/splitbrain/dokuwiki/tree/master/conf

Add some missing French translations