Fix 3 tooltip bugs: 285601, 323387 and 311220. When showing tooltips, make sure that their browser is still frontmost, and that their window is the main window. Also hide tooltips when switching tabs.

Also contains a localized string fix related to bug 321882.

camino/src/browser/BrowserWindowController.mm

@@ -754,7 +754,7 @@ enum BWCOpenDest {
       IconPopUpCell* iconCell = [[[IconPopUpCell alloc] initWithImage:[NSImage imageNamed:@"popup-blocked"]] autorelease];
       [mPopupBlocked setCell:iconCell];
       [iconCell setFont:savedFont];
-      [mPopupBlocked setToolTip:NSLocalizedString(@"A web popup was blocked", "Web Popup Toolitp")]; 
+      [mPopupBlocked setToolTip:NSLocalizedString(@"PopupBlockTooltip", @"")]; 
 //      [iconCell setPreferredEdge:NSMaxYEdge];
       [iconCell setMenu:savedMenu];
       [iconCell setBordered:NO];

camino/src/browser/BrowserWrapper.mm

@@ -357,6 +357,8 @@ static NSString* const kOfflineNotificationName = @"offlineModeChanged";
 
 -(void)willResignActiveBrowser
 {
+  [mToolTip closeToolTip];
+
   [[NSNotificationCenter defaultCenter] removeObserver:self name:kOfflineNotificationName object:nil];
   [mBrowserView setActive:NO];
 }
@@ -652,6 +654,11 @@ static NSString* const kOfflineNotificationName = @"offlineModeChanged";
 //
 - (void)onShowTooltip:(NSPoint)where withText:(NSString*)text
 {
+  // if this tooltip originates from a tab that is (now) in the background,
+  // or a background window, don't show it.
+  if (![self window] || ![[self window] isMainWindow])
+    return;
+
   NSPoint point = [[self window] convertBaseToScreen:[self convertPoint: where toView:nil]];
   [mToolTip showToolTipAtPoint: point withString: text overWindow:mWindow];
 }

camino/src/browser/ToolTip.mm

@@ -182,8 +182,12 @@ const float kVOffset = 20.0;
 
 - (void)closeToolTip
 {
+  // we can get -closeToolTip even if we didn't show it
+  if ([mTooltipWindow isVisible])
+  {
     [[mTooltipWindow parentWindow] removeChildWindow:mTooltipWindow];
     [mTooltipWindow orderOut:nil];
+  }
 
   [[NSNotificationCenter defaultCenter] removeObserver:self];
 }