allow the guts of gui_sync_list to be used with owner drawn items
WIP
printcell_helper--
goal: allow data to be displayed in a spreadsheet format with an easy to use interface
printcell_set_columns(gui_synclist, title, icon)
sets title and calculates cell widths
each column is identified by '$' character
ex 3 columns title = "Col1$Col2$Col3"
also accepts $*WIDTH$
ex 3 columns varying width title = "$*64$Col1$*128$Col2$Col3
printcell_enable(gui_synclist, enable)
sets the printcell function enabled
After setting the columns and enabling the printcell function
items can be added to the list like normal
column items are supplied delimited by '$'
ex item = "Item1$item2$item3"
they will be placed in cells defined by set_columns and scroll if the cell is too small
--Fixed for 1 bit & 2 bit displays
Change-Id: I49bd7903005d7a54e93af4379b0cdea63c860656
rb_info is just a test plugin
just some info from the running rockbox install
the real star here is the generator scripts to make actions_helper.c and button_helper.c
Change-Id: I23f7bbdae3f2cffca2490c4df40bb13b0b5d5064
