* 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.
Added application method to fix searching for user libraries.
Fixed documentation search path bug.
Moved auto pan setting from draw frame to draw panel were it is defined.
Some minor device context drawing changes.