Unknown index fixed by isset()

save.php, QuickFormQuery.php: fixed malformed array for JSON
Dirty.js, QfqForm.js: replace instance variable 'additionalQueryparameters' against parameter by call: optionalQueryParameters.

QfqForm.js: Preparation for client, to handle window.location.replace() by new API status 'url-skip-history'. Also changed "(data.redirect === "url" || data['redirect-url'])" to "(data.redirect === "url" && data['redirect-url'])" - CR did not understand the former logic ('or' instead of 'and'). #OPEN#: window.location.replace = 'index.php....' throws an JS exception that it the attribute 'replace' is readonly. Instead "window.location.replace('index.php....')" works as expected.
PROTOCOL.md: add 'url-skip-history'.
save.php: recode to become more readable.
QuickFormQuery.php: getForwardMode() - temporarily fix to update status 'page' to 'url' (bug never caused a problem as long as '||' has been used on client side). Will change 'page' to 'url' asap.

The new class T3info() was fine, but relying classes assumed that all array elements always exist. This was not given in the past. The new implemention creates at least an empty entry for each element.
AbstractException.php: removed garbage line.
save.php: require_once missing PHP Exception classes.
T3Info.php: recode.

save.php: return JSON with updated values of all fields.
AbstractBuildForm.php: updated to deliver values of all form elements
Constants.php: constants to distinguish all or specific values of FEs. QUERY_TYPE_*
Database.php: doSQL now returns affectedrows or lastinsertid in case of udpate/inset. Typos fixed.
QuickFormQuery.php: deliver Values as JSON after save.
Save.php: return lastinsertid or affectedrows.

save.php: moved constants to Constants.php to reuse them in delete.php. Fixed bug by building error messages.
Sip: extended queryStringToSip() by optional Parameter $scriptName.
AbstractBuilForm: renamed formEditLink() to createFormEditUrl(). Changed createFormEditUrl() to only return the final URL, without HTML tags. Implemented createDeleteUrl().
BuildFormBootstrap, BuildFormTable: rewrote code for using createFormEditLink(). Use of createDeleteUrl().
Constants: defined SIP_TABLE, API_*
QuickFormQuery: reformat Code

BuildFormBootstrap: fixed typo in class id pills
QfqForm.js: rewrote logic after press 'save'

BuildFormBootstrap: Save Button prepared.
AbstarcFromBuild: form.id specified