Remove startup delay from power saving code

Detail:
  s/Wimp02 - Get rid of the magic ~30 second delay before the Portable_Speed/Portable_Idle power saving kicks in. The fast/slow thresholds are self-adjusting, and any non-null poll event will kick the system into high speed, so removing the startup delay isn't likely to have any adverse affect on desktop startup time.
  s/Wimp01 - MaxIdleEvents is now redundant, remove it
Admin:
  Tested on Raspberry Pi 3
  Should resolve issue reported on the forums where RPCEmu thrashes the hosts's CPU for 30 seconds after entering the desktop:
  https://www.riscosopen.org/forum/forums/10/topics/8990


Version 5.59. Tagged as 'Wimp-5_59'

VersionASM

@@ -11,13 +11,13 @@
                         GBLS    Module_HelpVersion
                         GBLS    Module_ComponentName
                         GBLS    Module_ComponentPath
-Module_MajorVersion     SETS    "5.58"
-Module_Version          SETA    558
+Module_MajorVersion     SETS    "5.59"
+Module_Version          SETA    559
 Module_MinorVersion     SETS    ""
-Module_Date             SETS    "11 Apr 2017"
-Module_ApplicationDate  SETS    "11-Apr-17"
+Module_Date             SETS    "24 Jul 2017"
+Module_ApplicationDate  SETS    "24-Jul-17"
 Module_ComponentName    SETS    "Wimp"
 Module_ComponentPath    SETS    "castle/RiscOS/Sources/Desktop/Wimp"
-Module_FullVersion      SETS    "5.58"
-Module_HelpVersion      SETS    "5.58 (11 Apr 2017)"
+Module_FullVersion      SETS    "5.59"
+Module_HelpVersion      SETS    "5.59 (24 Jul 2017)"
                         END

VersionNum

-/* (5.58)
+/* (5.59)
  *
  * This file is automatically maintained by srccommit, do not edit manually.
  * Last processed by srccommit version: 1.1.
  *
  */
-#define Module_MajorVersion_CMHG        5.58
+#define Module_MajorVersion_CMHG        5.59
 #define Module_MinorVersion_CMHG        
-#define Module_Date_CMHG                11 Apr 2017
+#define Module_Date_CMHG                24 Jul 2017
 
-#define Module_MajorVersion             "5.58"
-#define Module_Version                  558
+#define Module_MajorVersion             "5.59"
+#define Module_Version                  559
 #define Module_MinorVersion             ""
-#define Module_Date                     "11 Apr 2017"
+#define Module_Date                     "24 Jul 2017"
 
-#define Module_ApplicationDate          "11-Apr-17"
+#define Module_ApplicationDate          "24-Jul-17"
 
 #define Module_ComponentName            "Wimp"
 #define Module_ComponentPath            "castle/RiscOS/Sources/Desktop/Wimp"
 
-#define Module_FullVersion              "5.58"
-#define Module_HelpVersion              "5.58 (11 Apr 2017)"
-#define Module_LibraryVersionInfo       "5:58"
+#define Module_FullVersion              "5.59"
+#define Module_HelpVersion              "5.59 (24 Jul 2017)"
+#define Module_LibraryVersionInfo       "5:59"

s/Wimp01

@@ -1269,7 +1269,6 @@ messages        #       4               ; =0 then no messages / -> messages bloc
 
 ; bits for portable speed control
 
-MaxIdleEvents   #       4               ; maximum number of idle events received
 ; see 321nk later
 IdlePerSec      #       4               ; amount of time spent in idle mode
  [ Stork

s/Wimp02

@@ -328,8 +328,8 @@ initfirsttask
         STR     R0,special_pointer
 ;
         STR     R0,IdlePerSec
-        MOV     R0,#-32
-        STR     R0,MaxIdleEvents        ; setup ready for speed monitoring
+        STR     R0,MaxSlowIdleEvents    ; setup ready for speed monitoring
+        STR     R0,MaxFastIdleEvents
 ;
         Push    "R0-R2"
  [ Stork
@@ -650,13 +650,6 @@ callback Entry "R0-R3"
         EORNES  r0, r0, #cf_active      ; r0=0 => command window active
         EXIT    EQ                      ; not active, so don't mess around with speed
 
-        LDR     r1, MaxIdleEvents        ; get the maximum read so far
-        CMP     r1, #0
-        ADDLT   r1, r1, #1
-        STRLT   r1, MaxIdleEvents        ; hmmm?
-        STRLT   r1, MaxSlowIdleEvents
-        STRLT   r1, MaxFastIdleEvents
-        EXIT    LT                      ; return if LT 0!
  [ Stork
        ;DREG    r3, "Idle count: ",cc,Integer