Merge remote-tracking branch 'origin/Enable_hardcoded_presentation_for_French_Class' into CleaningDevelopment

# Conflicts:
#	Packages/vr.teachr.structuretree/Runtime/Scripts/ImpulseController.cs

tree can be found in "TestThema"-folder
keywords for structure tree are case insensitive now

added a redundant check to avoid interpreting Tags as audiofiles

checked length of soundfile, checked if audionodechain consists of audiofiles and refactored the logic in a way taht some functions were removed from the monolithic structure of the handle impulse function

Merge remote-tracking branch 'origin/CleaningDevelopment' into Enable_hardcoded_presentation_for_French_Class

# Conflicts:
#	Packages/vr.teachr.displays/Runtime/Scripts/PresentationController.cs
#	Packages/vr.teachr.structuretree/Runtime/Scripts/ImpulseController.cs

Audiofiles 1A in themes Französisch2, 3 and 4 were missing but are
the same as in Französisch1
Unity stability increased in version 6000.0.31f

Added StudentNodechains for  Studentnodes
however:
	Time between nodes is not based on soundfile length
	Interaktion between animnodes and soundnodes are not testet and seem to be off

Merge remote-tracking branch 'origin/Enable_hardcoded_presentation_for_French_Class' into CleaningDevelopment

Merge remote-tracking branch 'origin/CleaningDevelopment' into Enable_hardcoded_presentation_for_French_Class

Unity version 6000.0.29
french audiofiles now student files from studio
updated french structure trees with latest didactic development
made impulses more consistent, e.g. positive triggers "good" behavior in french trees

removed debug structures
made some debug messages selectable

ToDo: remove all the debug messages

- deleted single node in Französisch5 (renamed now to 4)
- removed Französisch2

if there is a folder called "presentation" within the theme all jpg Pictures will be loaded on the whiteboard on themechange thru the website.

Not selecting students before giving an impulse selects random students
but these students inconsistently changed the node they were in
now they consistently do not change nodes on impulse but on evoke

when evoke resolves a none-impulse checks next interaction but
without a next node students were not able to repeat their current
node. Now a separate variable holds this state in BehaviourController

Merge branch 'CleaningDevelopment' of https://gitup.uni-potsdam.de/mm_vr/vr-klassenzimmer into CleaningDevelopment

Unity is now 6000.0.25f for LTS and various editor updates
Vive Focus 3 needed a separate package to be addressed
IKHandControl had too many debug logs

Files could not be opened in the web interface

Removed duplicate folder "webCommunication")

animations took less time then needed. The list in
SpecialBehaviours "multipleAnimations" was corrupted.
One IKHandle was incorrectly written in turnOffBunsenburner
structuretree config in chem were incorrectly globalknowledge=true

Files temporarily renamed.