2. Add action parameter to Select_All_Toggle operators, rename to Select_All.
Options are Toggle (default), Select, Deselect, Invert (same as select swap). This makes it possible to map separate hotkeys for select all and deselect all.
NOTE for Aligorith: I didn't change animation operators for select_all which already had an Invert operator. These should be fixed eventually.
however this meant the invoke function could not modify properties for exec to use (unless it called exec directly after)
since the popup for eg would re-instance the python class each time.
now use the operator properties directly through rna without an automatic copy.
now an operator attribute is accessed like this...
self.path --> self.properties.path
