Bug1183: make spectrogram settings scrollable for limited resolution

src/prefs/PrefsDialog.cpp

@@ -352,7 +352,13 @@ PrefsDialog::PrefsDialog
    // Frankly, this is a hack to work around a bug in wxTreebook, and
    // will have to be revisited if we add another category to mCategories.
    // JKC later added a category and 20 onto the 7.
+
    sz.y += 7 + 20;
+
+   // PRL:  Bug 161 is an obsolete concern with wx3; bug 1183 is a problem
+   // of minimum size being too great at low resolution.
+   sz.DecTo( ::wxGetDisplaySize() );
+
    SetSize(sz);
    SetMinSize(sz);
 

src/prefs/SpectrumPrefs.cpp

@@ -164,6 +164,8 @@ void SpectrumPrefs::PopulateOrExchange(ShuttleGui & S)
    // S.StartStatic(_("Track Settings"));
    // {
 
+   S.StartScroller(); {
+
    mDefaultsCheckbox = 0;
    if (mWt) {
       /* i18n-hint: use is a verb */
@@ -297,6 +299,8 @@ void SpectrumPrefs::PopulateOrExchange(ShuttleGui & S)
    S.EndStatic();
 #endif
 
+   } S.EndScroller();
+   
    EnableDisableSTFTOnlyControls();
 
    mPopulating = false;