addeed %sole-back start-of-line backspace, handled in sole and talk

ape/dojo.hoon

@@ -238,7 +238,11 @@
   ++  dy                                                ::  project work
     |_  dojo-project                                    ::
     ++  dy-abet  +>(poy `+<)                            ::  resolve
-    ++  dy-amok  +>(poy ~)                              ::  terminate
+    ++  dy-amok                                         ::  terminate
+      ?~  pux  +>(poy ~)
+      %.  [%txt "! cancel {<u.pux>}"]
+      he-diff:(he-card(poy ~) %exec u.pux our.hid ~)
+    ::
     ++  dy-ford                                         ::  send work to ford
       |=  [way=wire kas=silk]
       ^+  +>+>
@@ -709,6 +713,11 @@
       dy-make(cud `[nex (~(got by job) nex)])
     --
   ::
+  ++  he-baxp                                           ::  exit out of project
+    |=  ~  ^+  +>
+    ?~  poy  he-pine
+    he-pine:~(dy-amok dy u.poy)
+  ::
   ++  he-dope                                           ::  sole user of ++dp
     |=  txt=tape                                        ::
     ^-  (each (unit (each dojo-command tape)) hair)     ::  prefix/result
@@ -937,6 +946,7 @@
   |=  act=sole-action  ~|  poke/act  %.  act
   (wrap he-type):arm
 ::
+++  poke-sole-back  (wrap he-baxp):arm
 ++  made       (wrap he-made):arm
 ++  sigh-httr  (wrap he-sigh):arm
 ++  sigh-tang  |=([a=wire b=tang] ~|(`term`(cat 3 'sigh-' -.a) (mean b)))

ape/talk.hoon

@@ -992,6 +992,7 @@
           [%txt (weld "----------------| " (tufa buf))]
       ==
     ::
+    ++  sh-baxp  (sh-pact ~)                            ::  clear target
     ++  sh-sole                                         ::  apply edit
       |=  act=sole-action
       ^+  +>
@@ -1057,7 +1058,15 @@
     ?~  shu
       ~&  [%ra-console-broken ost.hid]
       +>.$
-    sh-abet:(~(sh-sole sh ~ (~(got by shells) ost.hid)) act)
+    sh-abet:(~(sh-sole sh ~ u.shu) act)
+  ::  
+  ++  ra-baxp
+    ^+  ..ra-baxp
+    =+  shu=(~(get by shells) ost.hid)
+    ?~  shu
+      ~&  [%ra-console-broken ost.hid]
+      ..ra-baxp
+    sh-abet:~(sh-baxp sh ~ u.shu)
   ::  
   ++  ra-emil                                           ::  ra-emit move list
     |=  mol=(list move)
@@ -1804,6 +1813,7 @@
   |=  [act=sole-action]
   ra-abet:(ra-sole:ra act)
 ::
+++  poke-sole-back  |=(~ ra-abet:ra-baxp:ra)            ::  SOL backspace
 ++  diff-talk-report                                    ::
   |=  [way=wire rad=report]
   ^-  (quip move +>)

lib/drum.hoon

@@ -134,6 +134,7 @@
 =>  |%                                                ::  arvo structures
     ++  pear                                          ::  request
       $%  [%sole-action p=sole-action]                ::
+          [%sole-back ~]                              ::  back out of dialog
           [%talk-command command:talk]                ::
       ==                                              ::
     ++  lime                                          ::  update
@@ -543,6 +544,7 @@
       ..ta(liv.maz =(~ fug))
     ..ta(fug (~(put by fug) gyl ``target`+<+))
   ::
+  ++  ta-poke  |=(a=pear +>(..ta (se-poke gyl a)))    ::  poke gyl
   ++  ta-ant                                          ::  toggle master
     ^+  .
     ?:  mav
@@ -563,7 +565,7 @@
     ^+  +>
     ?:  mav  
       +>.$
-    +>.$(+> (se-poke gyl %sole-action act))
+    (ta-poke %sole-action act)
   ::
   ++  ta-aro                                          ::  hear arrow
     |=  key=?(%d %l %r %u)
@@ -613,7 +615,8 @@
         ta-bel
       .(str.u.ris (scag (dec (lent str.u.ris)) str.u.ris))
     ?:  =(0 pos.inp)
-      .(+> (se-blit %bel ~))
+      (ta-poke %sole-back ~)
+      :: .(+> (se-blit %bel ~))
     =+  pre=(dec pos.inp)
     (ta-hom(pos.inp pre) %del pre)
   ::