convert FindInPouDialog from wx.Frame to wx.Dialog

In this case FindInPouDialog Windows isn't listed in windows manager
on Alt-Tab. And it's not shown on top of other applications. For
example, previously the dialog was shown even on top of web browser or
word processor.

temporary disable SFC transitions in IL, because matiec can't compile it

matiec freezes in this case.
See https://bitbucket.org/mjsousa/matiec/issues/58/iec2c-freezes-if-sfc-transition-is-in-il

fix issue with creating SFC transitions using ST and IL

Beremiz generates text representation for transitions without names.
Therefore transition name in its IL code is not needed.

replace '-' with '.' in resource tab and transition/action SFC code


This makes tab names consistent with the way the same information is shown in variable panel.

check during program generation whether source signal is defined for single task

fix strange behavior on Backspace press in ST

Before:
if text was selected and cursor was at indention, one indention (two
spaces) was removed.

if cursor was at start position of the line, then nothing happened.

if cursor was in the middle of indention then on backspace more
indention were added


Now:
if text is selected, it will be removed.
if cursor is at start position, then new line will be removed.
if cursor was in the middle of indention one indention is removed.

fix close button in system menu for AboutDialog on Windows


If SetEscapeId receives wx.ID_CLOSE as parameter, then on Windows with
wxPython 2.8 system close button in title bar stops working.
If wx.ID_CANCEL or wx.ID_OK is used in SetEscapeId call, then close
button works correctly.

make renames caseinsensitive

fix problem with SFC action/transition rename

Traceback (most recent call last):
File "/home/developer/WorkData/PLC/beremiz/beremiz/IDEFrame.py", line
1636, in OnProjectTreeItemEndEdit
elif new_name.upper() in [name.upper() for name in
self.Controler.GetProjectPouVariableNames(pou_name) if name !=
old_name]:
NameError: global name 'pou_name' is not defined

fix problem that it was impossible to edit SFC jump, if it references non-existent SFC step

remove all corresponding SFC jumps when SFC step is removed (but only in DRIVENDRAWING_MODE)

rename all corresponding SFC jumps when SFC step is renamed (but only in DRIVENDRAWING_MODE)

add check of new project path in Save As
add dialog window if selected directory is the current directory project, or already contains another project

fix issue that in Debug mode LD instance doesn't show correctly its state after
continuation of FBD_Connector.

Previously state signals doesn't propogate through FBD_Connector.