For Breakpoint data manipulation.

Reviewed-by: hjk

FIXME: add translations once interface has stabilized.

It also shows the response data.

The breakpoints are now (fairly) tightly guarded by the BreakpointHandler.
Engines and Views are only supposed to refer to them by id. They also have
individual states now. The breakpoint data is split into a "user requested"
"fixed" part in BreakpointData and the engines' acknowledged data in a new
struct BreakpointResponse.

TODO: Move m_state and m_engine members to BreakpointResponse. Fix regressions
in the marker handling.

There's  some 'external' and some 'internal' part now. Other plugins
are only supposed the external interface.

Reviewed-by: Friedemann Kleint
Reviewed-by: hjk

Reviewed-by: Arvid Ephraim Picciani <arvid.picciani@nokia.com>

Reviewed-by: hjk

Reviewed-by: con

There was not updated cached state within the marker object.

Reviewed-by: Friedemann Kleint

Task: QTCREATORBUG-2544

This is a stop-gap measure to make breakpoints usable again.
Proper fix is still needed.

Reviewed-by: Friedemann Kleint

Reviewed-by: hjk
Reviewed-by: aep <arvid.picciani@nokia.com>
Task-number: QTCREATORBUG-2612

Reviewed-by: hjk

Reviewed-by: Friedemann Kleint

Reviewed by:  Kai Koehne, Andre Poenitz

Remove break window menu action to toggle 'Full path'.
Remove gdb setting 'Use full path'.
Clean up break dialog:
- Set PathChooser::ExpectedKind before value (showed up in red).
- Use PathChooser::setPath()/path() instead of lineedit text
- Return thread spec
- Add validator for ignorecount as for breakcondition.ui
Remove unused fields from breakcondition.ui

Reviewed-by: hjk
Task-number: QTCREATORBUG-2593

Reviewed by:  Kai Koehne, Andre Poenitz

Reviewed-by: Friedemann Kleint

Make address a quint64, linnumber and ignoreCounts int.

Reviewed-by: hjk

namespace (from Debugger::Internal) as they are exported classes.
Introduce private classes to avoid exposing private JS debugger
headers.