refactor tooltips, messages, etc. in constants.py

[BBC-Esq]

Put all tooltips, messages in window boxes, etc. in one or more dictionaries within constants.py instead of defining each one as they currently are. This will allow importing a single thing in each scripts that needs one of these messages/tooltips or what not instead of having the specifically import each variable in each specific script, thus both shortening and simplifying multiple scripts and making it easier to add additional tooltips/messages in the future.