commit FS#9027 - conditional viewports

** BREAKS CURRENT WPS's  **
* %P has been removed, merged with the new %pb
* %pb is now %pb or %pb|bitmap|x|y|width|height| (any of those params can be - to use sane defaults... check wiki/task for more explaination)

* New %Vl and %Vd tags which are used to setup and display conditionaly displayed viewports (%Vl|<id>|<usual %V params>| to set up, then %Vd<id> to enable the viewport
* bumps the max allowed viewport count to 24
* you can setup 3 different progressbars in a WPS... max of one per viewport though

http://www.rockbox.org/tracker/task/9027?getfile=16785 is a simple perl script to convert old %P/%pb to the new %pb syntax

I'll commit changes to the cabbie wps soon which shows how to use %Vl/%Vd properly...

Reminder: %m will be removed soonish also so when fixing your WPS's remember to use conditional viewports to replace %m


git-svn-id: svn://svn.rockbox.org/rockbox/trunk@17759 a1c6a512-1295-4272-9138-f99709370657

wps/boxes.220x176x16.wps

@@ -1,5 +1,4 @@
 %X|backdrop-220x176.bmp|
-%P|pb-220.bmp|
 %xl|A|codec.bmp|40|102|22|
 %xl|B|encoding.bmp|40|108|2|
 %xl|C|repeat.bmp|124|10|4|
@@ -27,7 +26,7 @@
 
   %fbk
 
-%pb|8|0|208|
+%pb|pb-220.bmp|0|-|208|8|
 
 
 %ac%t5%s%?It<%It|%Fn>;%ac%t5%s%?Ia<%Ia|%D2>