elevate: Cannot save heart rate zones

Bug description: Heart rate zones cannot be changed. (or other zones, like cycle climbing)

Actual Behavior: Zone settings can be changed, and saved. But upon refresh, the old settings are still there

Expected Behavior: Changing any value and pressing “save” should save them.

Steps to Reproduce: Change any zone, save it. Go to a different page, then return to “set heart rate zone” page. It will have the old settings

Chrome version Vivaldi 1.13.1008.40, based on Chrome 62.0.3202.97

Plugin version: 5.12.1 Activities links?:

Console errors? (press F12 to see developer console, and copy paste here):

Fetch fitnessData from fitnessDataService.getFitnessData
FitnessDataService.js:68 Fetch fitnessObjectsWithDaysOff from fitnessDataService.getFitnessObjectsWithDaysOff
FitnessDataService.js:183 First preview day is Sat Jan 06 2018 00:00:00 GMT+0000 (GMT)
FitnessDataService.js:214 Generating FitnessData from storage took 369 ms.
fitnessTrendGraph.js:25 FitnessTrendGraph: message fitnessDataLoaded received
fitnessTrendGraph.js:267 Configure graph options
fitnessTrendTable.js:12 FitnessTrendTable: message fitnessDataLoaded received
fitnessTrendGraph.js:539 Generating Fitness Graph took 250 ms.
index.html#!/zonesSettings/heartRate:1 Unchecked runtime.lastError while running storage.set: QUOTA_BYTES_PER_ITEM quota exceeded
    at eval (chrome-extension://dhiaggccakkgdfcadnklkbljcgicpckn/options/app/directives/xtdZones/XtdZones.js:78:41)
    at Object.eval [as callback] (chrome-extension://dhiaggccakkgdfcadnklkbljcgicpckn/options/app/services/ChromeStorageService.js:78:17)
XtdZones.js:86 localStorageMustBeCleared has been updated to: true
11YearProgressController.js:260 Graph loaded
angular.js:14700 Possibly unhandled rejection: undefined
(anonymous) @ angular.js:14700
angular.js:14700 ARIA: Attribute " aria-label ", required for accessibility, is missing on node: <input ng-keypress=​"dialog.keypress($event)​" md-autofocus ng-model=​"dialog.result" placeholder ng-required=​"dialog.required" class=​"ng-pristine ng-valid md-autofocus md-input ng-not-empty ng-valid-required ng-touched" id=​"input_167" aria-invalid=​"false" style>​
(anonymous) @ angular.js:14700
index.html#!/zonesSettings/heartRate:1 Unchecked runtime.lastError while running storage.set: QUOTA_BYTES_PER_ITEM quota exceeded
    at eval (chrome-extension://dhiaggccakkgdfcadnklkbljcgicpckn/options/app/directives/xtdZones/XtdZones.js:78:41)
    at Object.eval [as callback] (chrome-extension://dhiaggccakkgdfcadnklkbljcgicpckn/options/app/services/ChromeStorageService.js:78:17)
XtdZones.js:86 localStorageMustBeCleared has been updated to: true
index.html#!/zonesSettings/heartRate:1 Unchecked runtime.lastError while running storage.set: QUOTA_BYTES_PER_ITEM quota exceeded
    at eval (chrome-extension://dhiaggccakkgdfcadnklkbljcgicpckn/options/app/directives/xtdZones/XtdZones.js:78:41)
    at Object.eval [as callback] (chrome-extension://dhiaggccakkgdfcadnklkbljcgicpckn/options/app/services/ChromeStorageService.js:78:17)
XtdZones.js:86 localStorageMustBeCleared has been updated to: true
index.html#!/zonesSettings/heartRate:1 Unchecked runtime.lastError while running storage.set: QUOTA_BYTES_PER_ITEM quota exceeded
    at eval (chrome-extension://dhiaggccakkgdfcadnklkbljcgicpckn/options/app/directives/xtdZones/XtdZones.js:78:41)
    at Object.eval [as callback] (chrome-extension://dhiaggccakkgdfcadnklkbljcgicpckn/options/app/services/ChromeStorageService.js:78:17)
XtdZones.js:86 localStorageMustBeCleared has been updated to: true
angular.js:14700 mdMenu: The $mdOpenMenu method is deprecated. Please use `$mdMenu.open`.
(anonymous) @ angular.js:14700
11YearProgressController.js:260 Graph loaded
2angular.js:14700 mdMenu: The $mdOpenMenu method is deprecated. Please use `$mdMenu.open`.
(anonymous) @ angular.js:14700
index.html#!/zonesSettings/ascent:1 Unchecked runtime.lastError while running storage.set: QUOTA_BYTES_PER_ITEM quota exceeded
    at eval (chrome-extension://dhiaggccakkgdfcadnklkbljcgicpckn/options/app/directives/xtdZones/XtdZones.js:78:41)
    at Object.eval [as callback] (chrome-extension://dhiaggccakkgdfcadnklkbljcgicpckn/options/app/services/ChromeStorageService.js:78:17)
XtdZones.js:86 localStorageMustBeCleared has been updated to: true
AthleteSettingsController.js:48 userMaxHr has been updated to 177
AthleteSettingsController.js:30 localStorageMustBeCleared has been updated to true
AthleteSettingsController.js:48 userMaxHr has been updated to 178
AthleteSettingsController.js:30 localStorageMustBeCleared has been updated to true
index.html#!/zonesSettings/heartRate:1 Unchecked runtime.lastError while running storage.set: QUOTA_BYTES_PER_ITEM quota exceeded
    at eval (chrome-extension://dhiaggccakkgdfcadnklkbljcgicpckn/options/app/directives/xtdZones/XtdZones.js:78:41)
    at Object.eval [as callback] (chrome-extension://dhiaggccakkgdfcadnklkbljcgicpckn/options/app/services/ChromeStorageService.js:78:17)
XtdZones.js:86 localStorageMustBeCleared has been updated to: true

Link screenshots or youtube video link if necessary: