Issue 394 - hit statistics tool data collection

lib/prefs.json

 {
   "defaults": {
     "currentVersion": "0.0",
     "enabled": true,
     "frameobjects": true,
     "fastcollapse": false,
     "showinstatusbar": false,
     "detachsidebar": false,
     "defaulttoolbaraction": 0,
     "defaultstatusbaraction": 0,
     "sidebar_key": "Accel Shift V, Accel Shift U",
     "sendReport_key": "",
     "filters_key": "Accel Shift E, Accel Shift F, Accel Shift O",
     "enable_key": "",
     "flash_scrolltoitem": true,
     "previewimages": true,
     "data_directory": "adblockplus",
     "patternsbackups": 5,
     "patternsbackupinterval": 24,
     "whitelistschemes": "about chrome file irc moz-safe-about news resource snews x-jsd addbook cid imap mailbox nntp pop data javascript moz-icon",
     "subscriptions_autoupdate": true,
     "subscriptions_listurl": "https://adblockplus.org/subscriptions2.xml",
     "subscriptions_fallbackurl": "https://adblockplus.org/getSubscription?version=%VERSION%&url=%SUBSCRIPTION%&downloadURL=%URL%&error=%ERROR%&channelStatus=%CHANNELSTATUS%&responseStatus=%RESPONSESTATUS%",
     "subscriptions_fallbackerrors": 5,
     "subscriptions_exceptionsurl": "https://easylist-downloads.adblockplus.org/exceptionrules.txt",
     "subscriptions_exceptionscheckbox": true,
     "documentation_link": "https://adblockplus.org/redirect?link=%LINK%&lang=%LANG%",
     "savestats": true,
+    "sendstats": false,
+    "sendstats_status": {},
+    "sendstats_last_push": 0,

[Wladimir Palant, 2016/03/22 21:32:36]

How about making last_push part of sendstats_status as well?

[saroyanm, 2016/04/06 15:15:43]

Done, you think I can also make "sendstats" part of "sendstats_status" and
rename it to "sendstats" ?

+    "sendstats_url": "https://telemetry.adblockplus.org/submit/adblockplus",
     "composer_default": 2,
     "clearStatsOnHistoryPurge": true,
     "report_submiturl": "https://reports.adblockplus.org/submitReport?version=1&guid=%GUID%&lang=%LANG%",
     "recentReports": [],
     "hideContributeButton": false,
     "blockableItemsSize": {"width": 200, "height": 200},
     "notificationurl": "https://notification.adblockplus.org/notification.json",
     "notificationdata": {},
     "subscriptions_antiadblockurl": "https://easylist-downloads.adblockplus.org/antiadblockfilters.txt",
     "please_kill_startup_performance": false,
     "suppress_first_run_page": false,
     "notifications_showui": false,
     "notifications_ignoredcategories": []
   },
   "preconfigurable": ["suppress_first_run_page"]
 }