UI: Add 24 NTSC as a common FPS value

UI/forms/OBSBasicSettings.ui

@@ -2936,8 +2936,8 @@
              <rect>
               <x>0</x>
               <y>0</y>
-              <width>98</width>
-              <height>28</height>
+              <width>800</width>
+              <height>69</height>
              </rect>
             </property>
            </widget>
@@ -3091,10 +3091,10 @@
              <item alignment="Qt::AlignTop">
               <widget class="QComboBox" name="fpsCommon">
                <property name="currentText">
-                <string notr="true">30</string>
+                <string notr="true">10</string>
                </property>
                <property name="currentIndex">
-                <number>3</number>
+                <number>0</number>
                </property>
                <item>
                 <property name="text">
@@ -3106,6 +3106,11 @@
                  <string notr="true">20</string>
                 </property>
                </item>
+               <item>
+                <property name="text">
+                 <string>24 NTSC</string>
+                </property>
+               </item>
                <item>
                 <property name="text">
                  <string notr="true">29.97</string>
@@ -3255,8 +3260,8 @@
           <rect>
            <x>0</x>
            <y>0</y>
-           <width>98</width>
-           <height>28</height>
+           <width>818</width>
+           <height>697</height>
           </rect>
          </property>
          <layout class="QFormLayout" name="hotkeyLayout">

UI/window-basic-main.cpp

@@ -4487,6 +4487,9 @@ void OBSBasic::GetFPSCommon(uint32_t &num, uint32_t &den) const
 	} else if (strcmp(val, "20") == 0) {
 		num = 20;
 		den = 1;
+	} else if (strcmp(val, "24 NTSC") == 0) {
+		num = 24000;
+		den = 1001;
 	} else if (strcmp(val, "25") == 0) {
 		num = 25;
 		den = 1;

UI/window-basic-settings.cpp

@@ -1192,7 +1192,7 @@ static inline void LoadFPSCommon(OBSBasic *main, Ui::OBSBasicSettings *ui)
 			"FPSCommon");
 
 	int idx = ui->fpsCommon->findText(val);
-	if (idx == -1) idx = 3;
+	if (idx == -1) idx = 4;
 	ui->fpsCommon->setCurrentIndex(idx);
 }