This makes the code in the various toolbox more generic. The arguments
of the text to insert are each replaced by a Ion::Charset::Empty.
These Empty chars are used to create layouts in ExpressionLayoutFields,
and to compute the position of the cursor in other fields, before being
removed.
Change-Id: Ie81c1e394b06fef2ab801ccff919d6550f70ec30
A boolean in ViewController states if the ViewController wants MaximumSpace (do
not show any stack view headers), or if it does not want to add its own title to
the stack view headers. If the ViewController's title is null, it is not added
to the stack view headers.
By default, ButtonRowControllers do not want to add their title (because they
are only used for now in TabViews, where the title is already displayed in the
tab).
Change-Id: I9e4c64b845262e4d44eb03cf769950f9c9e67a3a
MathToolbox methods moved to its parent, Toolbox (in escher).
Node and ToolboxNode classes renamed MessageTree and ToolboxMessageTree.
They are now in escher/, not in apps/.
Change-Id: Ibb26b0e9016094cef79506a1e9fc6dfb492d7103
