Debugger: Add start with step-into for LLDB

Task-number: QTCREATORBUG-11596

Change-Id: I4561d74524b70bc81345ab9beb60ec7242045509
Reviewed-by: Christian Stenger <christian.stenger@digia.com>
Make find options in tool bar more accessible.

Open a popup that doesn't close on every change of an option.
Make the options button accessible through tab.

Task-number: QTCREATORBUG-11340

Change-Id: I61b83243ead4b0b3d7075c1e8f8327cd31d9c2c4
Reviewed-by: Bojan Petrovic <bojan85@gmail.com>
Reviewed-by: Orgad Shaneh <orgads@gmail.com>