land editor refactor to remove iframes in most situations

[alex]

like it says on the tin. The editor may be horribly broken after this change.

[alex]

(In [13373]) lands the RichText? refactor to remove use of iframes unless explicitly requested or on a degenerate browser (e.g., FF2). Refs #6582. !strict

[liucougar]

(In [13374]) refs #6582: re-merge [13304], [13328], [13335], [13262] and [13257] which were lost in the refactor

[liucougar]

(In [13375]) refs #6582: use dijit._editor.getChildrenHtml instead of Editor.getChildrenHtml

[liucougar]

(In [13382]) refs #6582: detect useIframe correctly when styleSheets or useIframe is explicitly specified refs #6584: fix broken auto-expand when iframe is used refs #6583: enable alwaysshowtoolbar plugin for editor when iframe is used (which is needed to support auto-expand)

[peller]

(In [13577]) Fixes #6376 on 1.1 branch only, to defer setValue if editor is still loading. No longer a problem on trunk after Alex's refactor (see #6582)

[bill]

Notes from Alex at dojo meeting a few days ago, about remaining work on this:

Remaing work deals w/focus.

Tabbing from the toolbar to the editor itself is b0rken now that they're in the same document (the selection range gets oblitterated, etc). So calling the commands doesn't "work" the way it used to since the selection may be hosed so the selection range gets collapsed when you focus on something else and the undo stack gets polluted.

Anyway, we've noted this all before. The solution is to excise the command system and make sure that focus events preserve selection at all times.

[liucougar]

just tried tab/shift-tab in the editor, it does not invalidate the selection in editor