Fixed chunkinfo and RAllocatorHelper crashes. Details: * Tidied leak docs * Updated dialog command to workaround text windowserver bug and implement DIALOG_IMPL as an enum option. Also tried to support dismissing the dialog with CTRL-C but ended up just printing a warning as the notifier API is broken * Fixed RAllocatorHelper::OpenChunkHeap() (and thus chunkinfo <address>) and took Adrian's latest changes. * Fixed chunkinfo OOM problem

---------------------------- Test U1 ------------------------------
1:X one
2:X two3:X three4:X four
5:X five
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7:X seven…8:X eight
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---------------------------- Test U2 ------------------------------
12-Before 111
13-Before 222
14-Before 333…15:Match
16-After 111
17-After 222
18-After 333