Dialogs reorganization

Currently there are too many dialogs, they are confusingly named, and their functions overlap. We must reduce the number of dialogs to a manageable amount and reorganize them. Here's my plan:

Detachable toolbars in the document window

• (DONE) Toolbox: becomes a docked (but detachable) toolbar with only the several tool buttons (and not the entire roll as before).

• SecondaryToolbar: new, combines secondary buttons from the toolbox plus some other options and controls.

• ColorPalette: new, to be created, at the bottom of the window by default. Also incorporates the CurrentColorWidget.

• PreferencesDialog

Floating dialogs

• Fill and Stroke: stays mostly as is, with usability tweaks.

• Text and Font: stays, but with changes as described on the TextUsability page.

• (DONE) Size and Position: to be eliminated, its controls go to the SecondaryToolbar for Selector

• Transformations: stays mostly as is, with usability tweaks and new features added.

• Align and Distribute: stays mostly as is, with usability tweaks and new features added.

• Item properties: to be eliminated, its controls are disposed of as follows:

• • ID field is redundant, there is the same functionality in XML editor

• • Sensitive, visible, active, printable toggles: IMHO these properties must be editable for layers, not for individual objects; if you absolutely must set them for an object, you can do so in XML editor. So leave them for now, but delete as soon as we have a Layers dialog.

• • Transparency: redundant, use Fill and Stroke instead

• • Transformation matrix: a useful thing, but it will be much more appropriate as a new tab on the Transformations dialog - move it there

• XML editor: stays as is

• Document settings: to be eliminated, its controls go to the new Document settuings (below)

• Editing window: is renamed to Document settings. The content of the former "Document settings" go to its "Page" tab. All the options in this dialog must be saved with the document (into sodipodi:namedview).

• Tool options: to be eliminated, its content goes either to Preferences (for Selector) or to the SecondaryToolbar (for other tools), with the exception of the "Defaults" buttons that must be removed.

• Tool attributes: absolutely redundant, to be eliminated. (DONE removing from the menu, but the leftover code is to be eliminated also)

• Display settings: is renamed to "Preferences" and massively expanded, see PreferencesDialog.

• Layers: new, to be created when the layers are fully implemented.

Other things to be done in all dialogs:

• Reduce size as much as possible. Smaller fonts, denser layout. Currently some dialogs are way too bulky.

• More hotkeys! Most if not all widgets with text (buttons, tabs) must have one of the letters with an underscore so that alt-letter will jump there.

• More tooltips!

• Eliminate all Close buttons (redundant) and Apply buttons where it makes sense

• Fix keybindings in widgets:
  • Ctrl-PgDn/Ctrl-PgUp in spinbuttons must not cause them to change value! These are for switching tabs.
  • Tab in text widgets must not insert tab char - it's for navigating widgets.