Log Message:
wxGTK30: update to 3.0.4.

Switch to gtk3.
Remove libtool patch, the maintenance effort is too high.

3.0.4: (released 2018-03-08)
----------------------------

All (non-GUI):

- Don't crash on trailing '%' in wxDateTime::Format().
- Fix various problems when parsing invalid ZIP files.
- Fix generic wxTimePickerCtrl to accept max values from keyboard.
- Multiple surrogate-related fixes in UTF-16 support.
- Fix reading wide character data in wxFile::ReadAll().
- Make parsing WAV data more robust.
- Fix copy ctor in numeric validators classes.

All (GUI):

- Fix wxListbook::GetPageImage() to not always return -1 (Kinaou Hervé).
- Don't reset scroll position to zero when window size changes.
- Prevent use of deleted wxDocMDIChildFrame in wxView dtor.
- Avoid delayed destruction if TLW was never created.
- Fix possible crash when destroying wxTextCtrl using hints.
- Fix display of non-breaking spaces in wxHTML non-Unicode build.
- Fix memory leak of wxClientData when wxChoice is deleted.
- Draw a point instead of a line in wxGCDC::DrawPoint().
- Set wxPG cell background colour as wxPGComboBox background colour.
- Fix ribbon page issues.
- Avoid permanently setting text hint color when using generic text entry hints.
- Avoid overriding text control color in generic wxSearchCtrl.
- Fix auto-sizing multiline wxGrid column labels with empty lines.
- Fix displaying labels of wxRadioBox items.
- Update selection in wxAuiNotebook correctly after tab move.

wxGTK:

- Allow using more recent WebKit2GTK+ in wxWebView (Scott Talbert).
- Fix displaying wxRadioBox items labels containing ampersands.
- Fix creating cursor from XBM data with GTK3.
- Fix wxComboBox entry sizing with GTK+ >= 3.20.
- Fix drawing miniframe resize grip with GTK3.
- Fix unresponsive frame after using wxHtmlHelpFrame from a dialog.
- Fix SetPen() with a re-used user dash array.
- Fix memory leak when wxDataViewCtrl is deleted.
- Avoid some GTK+ run-time errors when using wx{File,Dir}PickerCtrl.
- Avoid crashing when wxTaskBarIcon is used with a non-X11 display.
- Hide wxSpinButton's underlying GtkEntry using CSS on GTK+ >= 3.20.
- Fix wxButton::SetBitmapPosition() with GTK+ 3.
- Use CSS for window font and colors on GTK3.
- Fix keyboard navigation for controls which are initially disabled.
- Don't destroy clipping region if empty clipping region is required.
- Fix for modified state not set after next change following a ChangeValue().
- Avoid invisible wxTextCtrl selection with GTK+3.
- Fix non-default background issues with GTK+2.
- Apply current style to wxStaticBox container when it's created.
- Prevent widgets from drawing outside their allocation with GTK+3.
- Fix custom scheme handling in wxWebView WebKit2 implementation.

wxMSW:

- Fix BSTR memory leaks in wxMediaCtrl and wxWebView (PB).

wxOSX:

- Fix build with 10.13 (High Sierra) SDK (François-Xavier Coudert).
- Fix removing tools from wxToolBar.
- Fix crash when switching between monitors.
- Handle stand-alone weekday and month names in macOS date formats.

- Disable use of AVKit is 32 bit wxOSX builds.