remove ability to ignore space; decrease delay

the previous implementation of the timer created issues
    where characters could sometimes be ignored altogether.
It also didn't play nice with my earlier opitimization that ignored
    space presses in most cases, so spaces will no longer be ignored.

Author: molsonkiko

NppNavigateTo/Forms/FrmNavigateTo.cs

@@ -93,8 +93,6 @@ partial class FrmNavigateTo : Form
 
         private bool tooManyResultsToHighlight { get; set; } = false;
 
-        private bool lastCharCannotChangeResults { get; set; } = false;
-
         public FrmNavigateTo(IScintillaGateway editor, INotepadPPGateway notepad)
         {
             this.editor = editor;
@@ -531,7 +529,6 @@ private void dataGridView1_MouseClick(object sender, MouseEventArgs e)
 
         private void SearchComboBoxKeyDown(object sender, KeyEventArgs e)
         {
-            lastCharCannotChangeResults = false;
             switch (e.KeyCode)
             {
                 case Keys.Back:
@@ -587,14 +584,6 @@ private void SearchComboBoxKeyDown(object sender, KeyEventArgs e)
                     e.Handled = true;
                     e.SuppressKeyPress = true;
                     break;
-
-                case Keys.Space:
-                    // adding space can't change the results unless:
-                    // - the space is part of a character class in a glob (e.g. "[ ]" matches literal whitespace)
-                    // - the space would push the number of chars in the search box over the min char limit
-                    int minLength = FrmSettings.Settings.GetIntSetting(Settings.minTypeCharLimit);
-                    lastCharCannotChangeResults = searchComboBox.Text.Length != minLength && searchComboBox.Text.IndexOf('[') == -1;
-                    break;
             }
         }
 
@@ -671,8 +660,6 @@ private bool NavigateGridDown(bool isShiftPressed)
 
         private void SearchComboBoxTextChanged(object sender, EventArgs e)
         {
-            if (lastCharCannotChangeResults)
-                return;
             lastKeyPressTimer.Start();
             lastKeypressTicks = System.DateTime.UtcNow.Ticks;
         }
@@ -682,7 +669,7 @@ private void LastKeyPressTimer_Elapsed(object sender, EventArgs e)
             Invoke(new Action(() =>
             {
                 // allow keypresses more recent than the interval, because we can't rely on precise timing of this event firing
-                if (System.DateTime.UtcNow.Ticks <= lastKeypressTicks + System.TimeSpan.TicksPerMillisecond * lastKeyPressTimerInterval / 4)
+                if (System.DateTime.UtcNow.Ticks <= lastKeypressTicks + System.TimeSpan.TicksPerMillisecond * lastKeyPressTimerInterval / 10)
                     return;
                 int textLength = searchComboBox.Text.Length;
                 bool emptyText = string.IsNullOrWhiteSpace(searchComboBox.Text);