Adds menu-item information about accelerators, makes "ctrl-x" clear all (as in dbgview).
Adds menu-item information about accelerators, makes "ctrl-x" clear all (as in dbgview).

Review URL: http://codereview.appspot.com/1191041

git-svn-id: db59699583a60be9a535cd09cdc9132301867226@64 15e8cca8-e42c-11de-a347-f34a4f72eb7d

wangming28/syzygy,google/syzygy,pombreda/syzygy,sebmarchand/syzygy,sebmarchand/syzygy,wangming28/syzygy,sebmarchand/syzygy,Eloston/syzygy,pombreda/syzygy,pombreda/syzygy,supriyantomaftuh/syzygy,supriyantomaftuh/syzygy,pombreda/syzygy,ericmckean/syzygy,wangming28/syzygy,Eloston/syzygy,ericmckean/syzygy,google/syzygy,supriyantomaftuh/syzygy,ericmckean/syzygy,google/syzygy,ericmckean/syzygy,sebmarchand/syzygy,supriyantomaftuh/syzygy,pombreda/syzygy,wangming28/syzygy,google/syzygy,sebmarchand/syzygy,ericmckean/syzygy