Fix comment typo.

Change-Id: I8ebe3ad2a6efcf1797a2dc941994c7fc1e36f4bf
LOK: Add getPartName.

By default (i.e. for writer) we can just return an empty string,
and we only actually need to implement ITiledRenderable's
getPartName for components that actually support it (i.e. calc/impress).

Change-Id: I8b381e5d7a8000638b02f763b4bea8ef0226f8e0
LOK: add setPartMode.

This API seems to be simplest in the long run where we'll want to be
able to select between rendering slides/notes/both/embedded objects,
and maybe even adding the option of switching between continuous
and single page mode in writer (although I have no idea how hard
getting a single page mode out of writer would be).

Change-Id: I5bdfdb61854c37281c6992c8f3ed1c50c8aa0919
Remove horrifically outdated comment.

Change-Id: I1362489c9aecf536b31bf6ab57ad8c149f37a876
LOKDocView: add part name retrieval.

Change-Id: Iac31de0410d7f6187e5884152c329375047a23f4
gtktiledviewer: show part names in selector.

Change-Id: I02ae5b729f96e36b3f226218b32495907cb63cf3
Impress: Implement getPartName.

Change-Id: I614838505fef901fc37e8d3906bb59c60b034453
ITiledRenderable: provide default implementations for some methods.

Writer doesn't understand the concept of parts at the moment, it
makes most sense to keep these dummy implementations central.

Change-Id: Iafbd89864b753ba2bed28a05b0f59df85f364feb
Impress/Tiled Rendering: return correct number for getPart.

It looks like page ids begin with 1.

Change-Id: I367285b8cfa1fcc9b8f22a9bb3c679d7e9579099
LOKDocView: add set_part_mode.

Change-Id: I0e14a535124e93979ef05431255911245a11aa29
Impress/Tiled Rendering: implement setPartMode.

Change-Id: I831953ac3fa1d0a15b64aa008cc3bfb79e72575a
Protect setPartMode and ensure we actually show the new mode.

Change-Id: I3642702c5bf268f3c9ab04162166078052804270
gtktiledviewer: add part mode selector.

Change-Id: Ia1e78df1d833f9b0fbda0b78136590c9c960fa27
LokDocView: set current item for part selector.

Change-Id: Idbb3d63803bd60a182a9b8e26620d11b2d643cb6
LokDocView: Update part selector when mode changes.

Change-Id: Ice754a46d07ce2714257c30e1aef27193b614cd3