others minor bugs fix.

others minor bugs fix.

Pcbnew: control of masks clearance: Pad Editor Dialog rewritten to handle local mask clearances and a local Net clearance

drc dialog was not showing the Netclass non-editable field on large font systems.  remember last size and position

* Complete comment translation for all EESchema source files.
* Complete comment translation for all 3D viewer source files.
* Rename class class_hierarchical_PIN_sheet to SCH_SHEET_PIN.
* Rename class DrawSheetStruct to SCH_SHEET.
* Tool tip capitalization fixes.
* Uncrustify and spell check comments and strings in all modified source
  files.

* Translate comments in source files beginning with A-E in eeschema.
* Spell check comments and strings and uncrusified all modified files.

  * Added exporting of netclass vias to specctra_export.
  * DIALOG_DESIGN_RULES now remembers it last selected TAB and screen position and
    window size, and its grid columns are automatically expanded to fit the
    column titles.  Remembering screen position and size allows someone with
    multiple monitors, to have a given window always come up on the monitor last chosen
    for it.

  * Added exporting of netclass vias to specctra_export.
  * DIALOG_DESIGN_RULES now remembers it last selected TAB and screen position and
    window size, and its grid columns are automatically expanded to fit the
    column titles.  Remembering screen position and size allows someone with
    multiple monitors, to have a given window always come up on the monitor last chosen
    for it.

* Replaced library pin properties dialog with wxFormBuilder version.
* Remove DialogBlocks version of pin properties dialog.
* Add pin properties dialog support code to pin object.
* Create single event handler for displaying pin properties dialog.
* Remove left over DialogBlocks project file for annotate dialog.
* Fixed escape key bug in library editor new component dialog.
* Add GetUnitsLabel() to get human readable units for dialog labels.
* Translate French comments in all modified files.
* Some minor clean up of Doxygen comments.

pcbnew Rewrite the GUI relative to the tracks widths and vias diameters and drills selection and edition, for compatibility with new netclass approach.

New format top level schematic files were not detected if they had a significant number of libraries.
The "Sheet 1" string can now be further down in the file than the original 20 line search could detect.

quiet the newer g++ compilers, which complain about certain stdio function's return values not being used