Document-specific native currency (and other properties)

(from [89958aad0900]) [#240 Document-specific native currency (and other properties)] Added a "Document Properties" view (it caused a lot of shuffling around in localizations). Also de-ui-fied qt.controllers.new_view.

The document properties aren't document-based yet, that's for the next commit.
https://bitbucket.org/hsoft/moneyguru/changeset/89958aad0900/

(from [13ad97985525]) [#240 Document-specific native currency (and other properties)] Removed prefs that have been moved to the docprops view from the pref panel. https://bitbucket.org/hsoft/moneyguru/changeset/13ad97985525/

(from [a7dda85a5b95]) [#240 Document-specific native currency (and other properties)] Moved docprops prefs from core.app to core.document (still pref based though). https://bitbucket.org/hsoft/moneyguru/changeset/a7dda85a5b95/

(from [0f54de900889]) [#240 Document-specific native currency (and other properties)] Made doc props document-based (saved/loaded with the document). https://bitbucket.org/hsoft/moneyguru/changeset/0f54de900889/

(from [fd0e95735750]) [#240 Document-specific native currency (and other properties)] Save all properties in the same element instead of one prop per element. https://bitbucket.org/hsoft/moneyguru/changeset/fd0e95735750/

(from [795d9900c7af]) [#240 Document-specific native currency (and other properties)] The default currency because a document-based setting rather than an app-based one. A combobox to edit it was added to the doc props view. https://bitbucket.org/hsoft/moneyguru/changeset/795d9900c7af/