This avoids issues when we have multiple clkinfos visible. The first clkinfo may want to focus itself, but a second clkinfo may then unfocus, deleting the first's effects (i.e. setting `CLKINFO_FOCUS`).
In detail:
`CLKINFO_FOCUS` will be set (to `true`) by the first handler (left hand clkinfo) and then unset (/ `delete`d) by the second handler (right hand clkinfo).
This is done in [the `touchHandler`](c2ea454a3b/apps/clock_info/lib.js (L313-L324)).
This commit makes `CLKINFO_FOCUS` a count.
- When we have a tap on a previous clkinfo (previous as in, earlier in the event handler list), it'll focus itself, `CLKINFO_FOCUS++`
- The later handler comes along, unfocuses itself, `CLKINFO_FOCUS--`
- `CLKINFO_FOCUS` is now `1`, so clkinfo is registered as being focussed still, meaning quicklaunch will work because of:
> c2ea454a3b/apps/quicklaunch/boot.js (L36-L36)Fixes#3355
Gordon Williams
thyttan
Rob Pilling