* Rewording some of the message sequence nodes
* Fix batch test for overlap renaming
* Finish msg-sequence node help rewording
* Rename maxKeptMsgsCount to nodeMessageBufferMaxLength
* Rename nodeMessageBufferMaxLength in tests
* Remove Join-merge mode for later rework
* new UI for parts support of SWITCH node
* update UI of SWITCH node for parts support
* add server side code of new SWITCH node
* update info document of SWITCH node
* add tests for new SWITCH node features
* add test for too many pending messages & related fixes
* fix handling when msg is undefined
* tabs -> spaces
* fixed meaning of "repair sequence" in SWITCH node docs
* add a note on restricting internally kept messages
* change label and position in menu of "pos. between" rule
* fixed typos (again, sorry)
* initial support of merge mode of JOIN node
* initial support of reduce mode of JOIN node
* update info document of JOIN node
* add tests for merge & reduce mode of JOIN node
* tidy tabs & spaces
* add test for too many pending messages & related fixes
* add an test for reduce mode of JOIN node
* change order of modes of SWITCH node
* add initial topics entry of merge mode
* fixed descriptions on "reduce right" checkbox
* fixed update of typedInput field of reduce mode
* fixed a typo in info document of JOIN node
* allow empty string in JSONata input field of reduce mode
* fixed a typo
* fixed error in reduce mode description
* initial support of BATCH node
* add concat mode & fix for docs and js code
* add tests for BATCH node
* minor correction of typo
* allow interval in float
* fixed message catalog
* add test for too many pending messages & related fixes
* update info document on batchMaxKeptMsgsCount
* fixed close callback
* fixed info document
* add initial topics entry of concat mode
* initial support of SORT node
minor fix of sort node
fixed error message of sort node
fixed error handling of SORT node
add test case for SORT node
make limit of messages count computed once in SORT node
* update type in message & info description
* fix handling of pending messages in SORT node