Make GUI strings more consistent

Most of the changes I've made here were because of small
differences between DolphinWX and DolphinQt2.

Source/Core/DolphinWX/Config/AdvancedConfigPane.cpp

@@ -52,7 +52,7 @@ void AdvancedConfigPane::InitializeGUI()
                                          "WARNING: Changing this from the default (100%) "
                                          "can and will break games and cause glitches. "
                                          "Do so at your own risk. Please do not report "
-                                         "bugs that occur with a non-default clock. "));
+                                         "bugs that occur with a non-default clock."));
 
   wxStaticText* const custom_rtc_description = new wxStaticText(
       this, wxID_ANY,

Source/Core/DolphinWX/Config/AudioConfigPane.cpp

@@ -36,7 +36,7 @@ void AudioConfigPane::InitializeGUI()
   m_dsp_engine_strings.Add(_("DSP LLE Interpreter (slow)"));
 
   m_dsp_engine_radiobox =
-      new wxRadioBox(this, wxID_ANY, _("DSP Emulator Engine"), wxDefaultPosition, wxDefaultSize,
+      new wxRadioBox(this, wxID_ANY, _("DSP Emulation Engine"), wxDefaultPosition, wxDefaultSize,
                      m_dsp_engine_strings, 0, wxRA_SPECIFY_ROWS);
   m_dpl2_decoder_checkbox = new wxCheckBox(this, wxID_ANY, _("Dolby Pro Logic II Decoder"));
   m_volume_slider = new DolphinSlider(this, wxID_ANY, 0, 0, 100, wxDefaultPosition, wxDefaultSize,