Add debug i18n comments and revise existing i18n comments

Source/Core/Core/HW/GCPadEmu.cpp

@@ -28,13 +28,13 @@ static const char* const named_buttons[] = {"A",          "B", "X", "Y", "Z", _t
                                             _trans("Mic")};
 
 static const char* const named_triggers[] = {
-    // i18n:  Left
+    // i18n: The left trigger button (labeled L on real controllers)
     _trans("L"),
-    // i18n:  Right
+    // i18n: The right trigger button (labeled R on real controllers)
     _trans("R"),
-    // i18n:  Left-Analog
+    // i18n: The left trigger button (labeled L on real controllers) used as an analog input
     _trans("L-Analog"),
-    // i18n:  Right-Analog
+    // i18n: The right trigger button (labeled R on real controllers) used as an analog input
     _trans("R-Analog")};
 
 GCPad::GCPad(const unsigned int index) : m_index(index)

Source/Core/DolphinWX/MainMenuBar.cpp

@@ -467,6 +467,7 @@ wxMenu* MainMenuBar::CreateSymbolsMenu() const
 wxMenu* MainMenuBar::CreateProfilerMenu() const
 {
   auto* const profiler_menu = new wxMenu;
+  // i18n: "Profile" is used as a verb, not a noun.
   profiler_menu->AppendCheckItem(IDM_PROFILE_BLOCKS, _("&Profile Blocks"));
   profiler_menu->AppendSeparator();
   profiler_menu->Append(IDM_WRITE_PROFILE, _("&Write to profile.txt, Show"));

Source/Core/DolphinWX/MainToolBar.cpp

@@ -222,8 +222,10 @@ void MainToolBar::AddDebuggerToolBarButtons()
   AddToolBarButton(IDM_SKIP, TOOLBAR_DEBUG_SKIP, _("Skip"),
                    _("Skips the next instruction completely"));
   AddSeparator();
+  // i18n: Here, PC is an acronym for program counter, not personal computer.
   AddToolBarButton(IDM_GOTOPC, TOOLBAR_DEBUG_GOTOPC, _("Show PC"),
                    _("Go to the current instruction"));
+  // i18n: Here, PC is an acronym for program counter, not personal computer.
   AddToolBarButton(IDM_SETPC, TOOLBAR_DEBUG_SETPC, _("Set PC"), _("Set the current instruction"));
 }