Improve usability in google chrome extension

[ymatuhin]

When we activate pesticide on any page, we save the state of the pesticide in localstorage. And then when we come back to the page when the pesticide state is true, we automatically activate the pesticide.

[mrmrs]

Hey @ymatuhin - thanks a bunch for the pull request.

From what I can tell from your comments and the code changes, this is undesirable behavior for how I want this plug-in to work. If you want pesticide to persist on page reload - it is available as a css module / sass partial for this purpose. You can just toggle the variable or include the css file in the head of your document. The plug-in is for quickly toggling it without the outlines persisting on page reload. Let me know if I am missing something. Thanks again for your effort on this.