Automatically select all text on beatmap ID textboxes (#287)

Author: stanriders

PerformanceCalculatorGUI/Screens/BeatmapLeaderboardScreen.cs

@@ -118,7 +118,8 @@ private void load()
                                             Anchor = Anchor.TopLeft,
                                             Label = "Beatmap ID",
                                             PlaceholderText = "Enter a beatmap ID or link",
-                                            CommitOnFocusLoss = false
+                                            CommitOnFocusLoss = false,
+                                            SelectAllOnFocus = true
                                         },
                                         calculationButton = new StatefulButton("Start calculation")
                                         {

PerformanceCalculatorGUI/Screens/SimulateScreen.cs

@@ -178,7 +178,8 @@ private void load(OsuColour osuColour)
                                             Label = "Beatmap ID",
                                             FixedLabelWidth = 100f,
                                             PlaceholderText = "Enter a beatmap ID or link",
-                                            CommitOnFocusLoss = false
+                                            CommitOnFocusLoss = false,
+                                            SelectAllOnFocus = true
                                         },
                                         beatmapImportTypeSwitch = new SwitchButton
                                         {