Prefer standard key name used by Qt

*  Prior ==> PgUP
  *  Next  ==> PgDown

The code for backward compatility with "Prior" and "Next" should
be removed after 2 or 3 major releases.

data/keyboard-layouts/default.keytab

@@ -101,8 +101,8 @@ key End         -AppCuKeys+KeyPad : "\E[F"
 
 key Insert      +KeyPad  : "\E[2~"
 key Delete      +KeyPad  : "\E[3~"
-key Prior -Shift+KeyPad  : "\E[5~"
-key Next  -Shift+KeyPad  : "\E[6~"
+key PgUp -Shift+KeyPad  : "\E[5~"
+key PgDown  -Shift+KeyPad  : "\E[6~"
 
 # other grey PC keys
 
@@ -121,10 +121,10 @@ key Delete      -AnyMod  : "\E[3~"
 key Insert      +AnyMod  : "\E[2;*~"
 key Delete      +AnyMod  : "\E[3;*~"
 
-key Prior -Shift-AnyMod  : "\E[5~"
-key Next  -Shift-AnyMod  : "\E[6~"
-key Prior -Shift+AnyMod  : "\E[5;*~"
-key Next  -Shift+AnyMod  : "\E[6;*~"
+key PgUp -Shift-AnyMod  : "\E[5~"
+key PgDown  -Shift-AnyMod  : "\E[6~"
+key PgUp -Shift+AnyMod  : "\E[5;*~"
+key PgDown  -Shift+AnyMod  : "\E[6;*~"
 
 # Function keys
 key F1  -AnyMod  : "\EOP"
@@ -161,10 +161,10 @@ key Space +Control : "\x00"
 # The scroll* operations refer to the history buffer.
 
 key Up    +Shift-AppScreen  : scrollLineUp
-key Prior +Shift-AppScreen  : scrollPageUp
+key PgUp +Shift-AppScreen  : scrollPageUp
 key Home  +Shift-AppScreen  : scrollUpToTop
 key Down  +Shift-AppScreen  : scrollLineDown
-key Next  +Shift-AppScreen  : scrollPageDown
+key PgDown  +Shift-AppScreen  : scrollPageDown
 key End   +Shift-AppScreen  : scrollDownToBottom
 
 

data/keyboard-layouts/historic/vt100.keytab

@@ -102,8 +102,8 @@ key F12    : "\E[24~"
 key Home   : "\E[H"  
 key End    : "\E[F"  
 
-key Prior -Shift : "\E[5~"  
-key Next  -Shift : "\E[6~"  
+key PgUp -Shift : "\E[5~"  
+key PgDown  -Shift : "\E[6~"  
 key Insert-Shift : "\E[2~"  
 
 # Keypad-Enter. See comment on Return above.
@@ -116,9 +116,9 @@ key Space +Control : "\x00"
 # some of keys are used by konsole.
 
 key Up    +Shift   : scrollLineUp
-key Prior +Shift   : scrollPageUp
+key PgUp +Shift   : scrollPageUp
 key Down  +Shift   : scrollLineDown
-key Next  +Shift   : scrollPageDown
+key PgDown  +Shift   : scrollPageDown
 
 key ScrollLock     : scrollLock
 

data/keyboard-layouts/historic/x11r5.keytab

@@ -36,8 +36,8 @@ key Home           : "\E[1~"
 key Insert-Shift   : "\E[2~"
 key Delete         : "\E[3~"
 key End            : "\E[4~"
-key Prior -Shift   : "\E[5~"
-key Next  -Shift   : "\E[6~"
+key PgUp -Shift   : "\E[5~"
+key PgDown  -Shift   : "\E[6~"
 
 # function keys
 
@@ -62,9 +62,9 @@ key Space +Control : "\x00"
 # The scroll* operations refer to the history buffer.
 
 key Up    +Shift   : scrollLineUp
-key Prior +Shift   : scrollPageUp
+key PgUp +Shift   : scrollPageUp
 key Down  +Shift   : scrollLineDown
-key Next  +Shift   : scrollPageDown
+key PgDown  +Shift   : scrollPageDown
 
 key ScrollLock     : scrollLock
 

data/keyboard-layouts/linux.keytab

@@ -103,8 +103,8 @@ key F12    : "\E[24~"
 key Home   : "\E[1~"  
 key End    : "\E[4~"  
 
-key Prior -Shift : "\E[5~"  
-key Next  -Shift : "\E[6~"  
+key PgUp -Shift : "\E[5~"  
+key PgDown  -Shift : "\E[6~"  
 key Insert-Shift : "\E[2~"  
 
 # Keypad-Enter. See comment on Return above.
@@ -117,9 +117,9 @@ key Space +Control : "\x00"
 # some of keys are used by konsole.
 
 key Up    +Shift   : scrollLineUp
-key Prior +Shift   : scrollPageUp
+key PgUp +Shift   : scrollPageUp
 key Down  +Shift   : scrollLineDown
-key Next  +Shift   : scrollPageDown
+key PgDown  +Shift   : scrollPageDown
 
 
 #----------------------------------------------------------

data/keyboard-layouts/solaris.keytab

@@ -72,8 +72,8 @@ key Home           : "\E[1~"
 key Insert-Shift   : "\E[2~" 
 key Delete         : "\E[3~" 
 key End            : "\E[4~" 
-key Prior -Shift   : "\E[5~" 
-key Next  -Shift   : "\E[6~" 
+key PgUp -Shift   : "\E[5~" 
+key PgDown  -Shift   : "\E[6~" 
  
 # function keys 
  
@@ -100,9 +100,9 @@ key Space +Control : "\x00"
 #key Left  +Shift   : prevSession 
 #key Right +Shift   : nextSession 
 key Up    +Shift   : scrollLineUp 
-key Prior +Shift   : scrollPageUp 
+key PgUp +Shift   : scrollPageUp 
 key Down  +Shift   : scrollLineDown 
-key Next  +Shift   : scrollPageDown 
+key PgDown  +Shift   : scrollPageDown 
 #key Insert+Shift   : emitSelection 
 
 # keypad characters are not offered differently by Qt.

data/keyboard-layouts/vt420pc.keytab

@@ -138,8 +138,8 @@ key F12+Shift    : "\E[24;2~"
 key Home   : "\E[H"  
 key End    : "\E[F"  
 
-key Prior -Shift : "\E[5~"  
-key Next  -Shift : "\E[6~"  
+key PgUp -Shift : "\E[5~"  
+key PgDown  -Shift : "\E[6~"  
 key Insert-Shift : "\E[2~"  
 
 # Keypad-Enter. See comment on Return above.
@@ -152,9 +152,9 @@ key Space +Control : "\x00"
 # some of keys are used by konsole.
 
 key Up    +Shift   : scrollLineUp
-key Prior +Shift   : scrollPageUp
+key PgUp +Shift   : scrollPageUp
 key Down  +Shift   : scrollLineDown
-key Next  +Shift   : scrollPageDown
+key PgDown  +Shift   : scrollPageDown
 
 
 #----------------------------------------------------------