Control character is <...>
Stop event propagation by default without the insert mode
Extracted the method
Added stop the event propagation option
Stop the event propagation if the option is available
Fixed typo
Use Dom.isEditable instead of Mode.isInsertMode to detect correctly a focusing element
Stop the event propagation when start a searching hint
Make a strict investigation for hiragana candidate
Stop the event propagation currectly
Also stop the event propagation when key processing was delegated to the mode processor
Executer should be created after adjust the current mode