Make the creation of _allow_ rules in panel an opt-in feature

There have been too many examples out there of users
opting-in to "I am an advanced user" and yet still misusing
dynamic filtering by creating _allow_ rules where _noop_
rules should be used.

Creating _allow_ rules has serious consequences as these
override blocking static filters and can potentially
disable other advanced filtering ability such as
HTML filtering and scriptlet injection -- often used
to deal with anti-blocker mechanisms.

The ability to point-and-click to create _allow_ rules
from the popup panel is no longer allowed by default.

An new advanced setting has been added to enable
the ability to create _allow_ rules from the popup
panel, `popupPanelGodMode`, which default to `false`.
Set to `true` to restore ability to set _allow_ rules
from popup panel.

Since the creation of _allow_ rules is especially useful
to filter list authors, to diagnose and narrow down site
breakage as a result of problematic blocking filter,
the creation of _allow_ rules will still be available
when the advanced setting `filterAuthorMode` is `true`.

This change is probably going to be problematic to all
those users who were misusing dynamic filtering by
creating _allow_ rules instead of _noop_ rules -- but
the breakage is going to bring their misusing to their
attention, a positive outcome.

Author: gorhill

src/css/popup-fenix.css

@@ -478,7 +478,9 @@ body.advancedUser #firewall > div > span.noopRule.ownRule,
 
 #actionSelector {
     box-sizing: border-box;
+    display: flex;
     height: 100%;
+    justify-items: stretch;
     left: 0;
     overflow: hidden;
     position: absolute;
@@ -488,16 +490,17 @@ body.advancedUser #firewall > div > span.noopRule.ownRule,
     }
 #actionSelector > span {
     display: inline-block;
-    height: 100%;
+    flex-grow: 1;
     }
 #actionSelector > #dynaAllow {
-    width: 33%;
+    display: none;
+    }
+body.godMode #actionSelector > #dynaAllow {
+    display: inline-block;
     }
 #actionSelector > #dynaNoop {
-    width: 33.5%;
     }
 #actionSelector > #dynaBlock {
-    width: 33.5%;
     }
 #actionSelector > #dynaCounts {
     background-color: transparent;

src/js/background.js

@@ -68,6 +68,7 @@ const µBlock = (( ) => { // jshint ignore:line
         popupFontSize: 'unset',
         popupPanelDisabledSections: 0,
         popupPanelLockedSections: 0,
+        popupPanelGodMode: false,
         popupPanelHeightMode: 0,
         requestJournalProcessPeriod: 1000,
         selfieAfter: 3,

src/js/messaging.js

@@ -269,6 +269,7 @@ const popupDataFromTabId = function(tabId, tabTitle) {
     const tabContext = µb.tabContextManager.mustLookup(tabId);
     const rootHostname = tabContext.rootHostname;
     const µbus = µb.userSettings;
+    const µbhs = µb.hiddenSettings;
     const r = {
         advancedUserEnabled: µbus.advancedUserEnabled,
         appName: vAPI.app.name,
@@ -278,7 +279,8 @@ const popupDataFromTabId = function(tabId, tabTitle) {
         firewallPaneMinimized: µbus.firewallPaneMinimized,
         globalAllowedRequestCount: µb.localSettings.allowedRequestCount,
         globalBlockedRequestCount: µb.localSettings.blockedRequestCount,
-        fontSize: µb.hiddenSettings.popupFontSize,
+        fontSize: µbhs.popupFontSize,
+        godMode: µbhs.filterAuthorMode || µbhs.popupPanelGodMode,
         netFilteringSwitch: false,
         rawURL: tabContext.rawURL,
         pageURL: tabContext.normalURL,
@@ -288,16 +290,16 @@ const popupDataFromTabId = function(tabId, tabTitle) {
         pageBlockedRequestCount: 0,
         popupBlockedCount: 0,
         popupPanelSections: µbus.popupPanelSections,
-        popupPanelDisabledSections: µb.hiddenSettings.popupPanelDisabledSections,
-        popupPanelLockedSections: µb.hiddenSettings.popupPanelLockedSections,
-        popupPanelHeightMode: µb.hiddenSettings.popupPanelHeightMode,
+        popupPanelDisabledSections: µbhs.popupPanelDisabledSections,
+        popupPanelLockedSections: µbhs.popupPanelLockedSections,
+        popupPanelHeightMode: µbhs.popupPanelHeightMode,
         tabId: tabId,
         tabTitle: tabTitle,
         tooltipsDisabled: µbus.tooltipsDisabled
     };
 
-    if ( µb.hiddenSettings.uiPopupConfig !== 'undocumented' ) {
-        r.uiPopupConfig = µb.hiddenSettings.uiPopupConfig;
+    if ( µbhs.uiPopupConfig !== 'undocumented' ) {
+        r.uiPopupConfig = µbhs.uiPopupConfig;
     }
 
     const pageStore = µb.pageStoreFromTabId(tabId);

src/js/popup-fenix.js

@@ -644,6 +644,13 @@ let renderOnce = function() {
     if ( popupData.popupPanelHeightMode === 1 ) {
         body.classList.add('vMin');
     }
+
+    // Prevent non-advanced user opting into advanced user mode from harming
+    // themselves by disabling by default features generally suitable to
+    // filter list maintainers and actual advanced users.
+    if ( popupData.godMode ) {
+        body.classList.add('godMode');
+    }
 };
 
 /******************************************************************************/