+ A newly added items now combine speakers

If an item has the same speaker as an existing one, it's put into that
parent.
* Speakers can no longer be collapsed
* Added basic speaker renaming
* Selecting a sample fills the speaker text box
+ Began adding basic saving & Loading
+ Speech Renames are now saved
+ Speaker names are now saved
+ Moved Main Window event IDs to .h file
* Fixed Samples not playing after load
* Fixed wrongly unreffing composition