UI: Fix a few locale items, and add a few missing ones

UI/data/locale/en-US.ini

@@ -69,6 +69,8 @@ Paste="Paste"
 PasteReference="Paste (Reference)"
 PasteDuplicate="Paste (Duplicate)"
 RemuxRecordings="Remux Recordings"
+Next="Next"
+Back="Back"
 
 # copy filters
 Copy.Filters="Copy Filters"
@@ -91,7 +93,7 @@ Basic.AutoConfig="Auto-Configuration Wizard"
 Basic.AutoConfig.Beta="Auto-Configuration Wizard (Beta)"
 Basic.AutoConfig.ApplySettings="Apply Settings"
 Basic.AutoConfig.StartPage="Usage Information"
-Basic.AutoConfig.StartPage.SubTitle="Specify what you want to to use the program for"
+Basic.AutoConfig.StartPage.SubTitle="Specify what you want to use the program for"
 Basic.AutoConfig.StartPage.PrioritizeStreaming="Optimize for streaming, recording is secondary"
 Basic.AutoConfig.StartPage.PrioritizeRecording="Optimize just for recording, I will not be streaming"
 Basic.AutoConfig.VideoPage="Video Settings"
@@ -137,7 +139,7 @@ Basic.Stats.CPUUsage="CPU Usage"
 Basic.Stats.HDDSpaceAvailable="HDD space available"
 Basic.Stats.MemoryUsage="Memory Usage"
 Basic.Stats.AverageTimeToRender="Average time to render frame"
-Basic.Stats.SkipppedFrames="Skipped frames due to encoding lag"
+Basic.Stats.SkippedFrames="Skipped frames due to encoding lag"
 Basic.Stats.MissedFrames="Frames missed due to rendering lag"
 Basic.Stats.Output.Stream="Stream"
 Basic.Stats.Output.Recording="Recording"

UI/window-basic-stats.cpp

@@ -74,8 +74,8 @@ OBSBasicStats::OBSBasicStats(QWidget *parent)
 
 	newStatBare("FPS", fps, 2);
 	newStat("AverageTimeToRender", renderTime, 2);
-	newStat("SkipppedFrames", skippedFrames, 2);
 	newStat("MissedFrames", missedFrames, 2);
+	newStat("SkippedFrames", skippedFrames, 2);
 
 	/* --------------------------------------------- */