Add global setting to enable filter observation

plugins/tiddlywiki/internals/filterinspection/ObserveResultsTab.tid

@@ -5,6 +5,11 @@ list-after: $:/plugins/tiddlywiki/internals/filterinspection/InspectResultsTab
 
 Log traces of this filter expression in the background. A trace will be generated every time the filter is evaluated, regardless of the context. The trace is only saved if the results are different from previous traces.
 
+<$checkbox tiddler="$:/config/FilterObservationionEnabled" field="text" checked="yes" unchecked="no" default="no">
+Enable background filter observation
+</$checkbox>
+
+
 <$button>
 <%if [all[shadows+tiddlers]tag[$:/tags/InspectableFilter]get[text]match{$:/temp/advancedsearch}count[]match[0]] %>
 	<$action-createtiddler $basetitle="$:/config/inspectable-filters/filter" tags="$:/tags/InspectableFilter" type="text/plain" text={{$:/temp/advancedsearch}}/>

plugins/tiddlywiki/internals/filterinspection/modules/startup.js

@@ -25,6 +25,10 @@ exports.startup = function() {
 	var accumulator = [];
 	// Add our hook for each filter evaluation
 	$tw.hooks.addHook("th-filter-evaluation",function(filterString,wrappers) {
+		// Check that filter observation is enabled
+		if($tw.wiki.getTiddlerText("$:/config/FilterObservationionEnabled","no") !== "yes") {
+			return wrappers;
+		}
 		// Get the list of filters to be inspected
 		var inspectedFilters = [];
 		$tw.wiki.eachTiddlerPlusShadows(function(tiddler,title) {

plugins/tiddlywiki/internals/not-to-be-merged/AdvancedSearch.tid

@@ -0,0 +1,3 @@
+title: $:/temp/advancedsearch
+
+[all[shadows+tiddlers]tag[HelloThere]] -[all[shadows+tiddlers]prefix[A]] :filter[<currentTiddler>tag[Community]]

plugins/tiddlywiki/internals/not-to-be-merged/FilterObservationEnabled.tid

@@ -0,0 +1,2 @@
+title: $:/config/FilterObservationionEnabled
+text: yes