Refine 'Screen Lock'.

Signal/src/ViewControllers/AppSettings/PrivacySettingsTableViewController.m

@@ -111,14 +111,10 @@ NS_ASSUME_NONNULL_BEGIN
     OWSTableSection *screenSecuritySection = [OWSTableSection new];
     screenSecuritySection.headerTitle = NSLocalizedString(@"SETTINGS_SECURITY_TITLE", @"Section header");
     screenSecuritySection.footerTitle = NSLocalizedString(@"SETTINGS_SCREEN_SECURITY_DETAIL", nil);
-    [screenSecuritySection
-        addItem:[OWSTableItem switchItemWithText:NSLocalizedString(@"SETTINGS_SCREEN_SECURITY", @"")
-                                            // If 'Screen Lock' is enabled, 'Screen Protection' is auto-enabled.
-                                            isOn:([Environment.preferences screenSecurityIsEnabled]
-                                                     || OWSScreenLock.sharedManager.isScreenLockEnabled)
-                                       isEnabled:!OWSScreenLock.sharedManager.isScreenLockEnabled
-                                          target:weakSelf
-                                        selector:@selector(didToggleScreenSecuritySwitch:)]];
+    [screenSecuritySection addItem:[OWSTableItem switchItemWithText:NSLocalizedString(@"SETTINGS_SCREEN_SECURITY", @"")
+                                                               isOn:[Environment.preferences screenSecurityIsEnabled]
+                                                             target:weakSelf
+                                                           selector:@selector(didToggleScreenSecuritySwitch:)]];
     [contents addSection:screenSecuritySection];
     
     OWSTableSection *removeMetadataSection = [OWSTableSection new];

Signal/src/util/OWSScreenLock.swift

@@ -10,18 +10,16 @@ import LocalAuthentication
     public enum OWSScreenLockOutcome {
         case success
         case cancel
-//        case userCancel
-//        case otherCancel
         case failure(error:String)
-//        case permanentFailure(error:String)
     }
 
+    @objc public let screenLockTimeoutDefault = 15 * kMinuteInterval
     @objc public let screenLockTimeouts = [
-        5 * kSecondInterval,
-        15 * kSecondInterval,
-        30 * kSecondInterval,
         1 * kMinuteInterval,
         5 * kMinuteInterval,
+        15 * kMinuteInterval,
+        30 * kMinuteInterval,
+        1 * kHourInterval,
         0
     ]
 
@@ -78,8 +76,7 @@ import LocalAuthentication
             return 0
         }
 
-        let defaultTimeout = screenLockTimeouts[0]
-        return self.dbConnection.double(forKey: OWSScreenLock_Key_ScreenLockTimeoutSeconds, inCollection: OWSScreenLock_Collection, defaultValue: defaultTimeout)
+        return self.dbConnection.double(forKey: OWSScreenLock_Key_ScreenLockTimeoutSeconds, inCollection: OWSScreenLock_Collection, defaultValue: screenLockTimeoutDefault)
     }
 
     @objc public func setScreenLockTimeout(_ value: TimeInterval) {

Signal/src/util/OWSScreenLockUI.m

@@ -147,9 +147,8 @@ NS_ASSUME_NONNULL_BEGIN
     // Show 'Screen Protection' if:
     //
     // * App is inactive and...
-    // * Either 'Screen Protection' or 'Screen Lock' is enabled.
-    BOOL shouldHaveScreenProtection = (self.appIsInactive
-        && (Environment.preferences.screenSecurityIsEnabled || OWSScreenLock.sharedManager.isScreenLockEnabled));
+    // * 'Screen Protection' is enabled.
+    BOOL shouldHaveScreenProtection = (self.appIsInactive && Environment.preferences.screenSecurityIsEnabled);
 
     BOOL shouldShowBlockWindow = shouldHaveScreenProtection || shouldHaveScreenLock;
     DDLogVerbose(@"%@, shouldHaveScreenProtection: %d, shouldHaveScreenLock: %d, shouldShowBlockWindow: %d",

Signal/translations/en.lproj/Localizable.strings

@@ -1538,7 +1538,7 @@
 "SCAN_QR_CODE_VIEW_TITLE" = "Scan QR Code";
 
 /* Indicates a delay of zero seconds, and that 'screen lock activity' will timeout immediately. */
-"SCREEN_LOCK_ACTIVITY_TIMEOUT_NONE" = "None";
+"SCREEN_LOCK_ACTIVITY_TIMEOUT_NONE" = "Instant";
 
 /* Title for alert indicating that screen lock could not be disabled. */
 "SCREEN_LOCK_DISABLE_FAILED" = "Screen Lock Could Not Be Disabled";