Closes #653, Remember last-accessed collection

Because of the way item caching works, this doesn't fix most of the startup delay problems, though

chrome/content/zotero/xpcom/collectionTreeView.js

@@ -69,8 +69,19 @@ Zotero.CollectionTreeView.prototype.setTree = function(treebox)
 	
 	this.refresh();
 	
-	//select Library
-	this.selection.select(0);
+	// Select the last-viewed collection
+	var lastViewedFolder = Zotero.Prefs.get('lastViewedFolder');
+	var matches = lastViewedFolder.match(/^(?:(C|S)([0-9]+)|L)$/);
+	var select = 0;
+	if (matches) {
+		if (matches[1] == 'C' && this._collectionRowMap[matches[2]]) {
+			select = this._collectionRowMap[matches[2]];
+		}
+		else if (matches[1] == 'S' && this._searchRowMap[matches[2]]) {
+			select = this._searchRowMap[matches[2]];
+		}
+	}
+	this.selection.select(select);
 }
 
 /*

chrome/content/zotero/xpcom/data_access.js

@@ -2564,6 +2564,8 @@ Zotero.Items = new function(){
 	
 	
 	function cacheFields(fields, items) {
+		Zotero.debug("Caching fields [" + fields.join() + "]"
+			+ (items ? " for " + items + " items" : ''));
 		_load(items);
 		
 		var primaryFields = [];

defaults/preferences/zotero.js

@@ -24,6 +24,7 @@ pref("extensions.zotero.capitalizeTitles", true);
 pref("extensions.zotero.lastCreatorFieldMode",0);
 pref("extensions.zotero.lastAbstractExpand",0);
 pref("extensions.zotero.lastRenameAssociatedFile", false);
+pref("extensions.zotero.lastViewedFolder", 'L');
 
 // Keyboard shortcuts
 pref("extensions.zotero.keys.overrideGlobal", false);