scide: help browser - support doc/impl/ref lookup for selected text
scide: search widget hierarchy upwards for first handler of lookup actions

When one of doc/impl/ref lookup actions is triggered, search from focus
widget up the hierarchy until finding one that actually has the action
handling method.
scide: GenericLookupDialog - no need for subclassing QTreeView anymore
scide: make doc/impl/ref lookup shortcuts work on detached docklets
scide: always pop up lookup dialogs with the active window as the parent
SCDoc: adjustment for deprecation of old help system
cleanups: errno.h is standard-compliant, no need for preprocessor #if

Signed-off-by: Tim Blechmann <tim@klingt.org>
cmake build system: add flag to enable sse2

Signed-off-by: Tim Blechmann <tim@klingt.org>
class library: modularize Server:plotTree, introduce Server:plotTreeView.

Split Server:plotTree into Server:plotTree and Server:plotTreeView. This allows to create one window monitoring multiple servers.
class library: Add Collection:injectr
Remove mention of FFTs in Convolution 3 help file.
qtcollider: start drag within mouse event handler

Fixes #375.
qtcollider: QEnvelopeView - add method to return all selected indexes
qtcollider: QListView - add 'selection' method to get all selected indexes
help: document new 'selection' methods of EnvelopeView and ListView
scdoc: more fix for deprecation of old help
qtcollider: replace VariantList with QVariantList

Custom wrapping of QList<QVariant> into VariantList struct was cumbersome
and pointless. Rather use Qt's own QVariantList typedef for the same type.
More MIDI System messages support

Signed-off-by: Scott Wilson <i@scottwilson.ca>
Add support for tuneRequest, tick, and activeSense to CoreMIDI backend

Signed-off-by: Scott Wilson <i@scottwilson.ca>
Add support for tuneRequest, and tick to AlsaMIDI

Signed-off-by: Scott Wilson <i@scottwilson.ca>