Added option/input to set TextScreen font

Available fonts:
+    WireGPU_ConsoleFont
+    Coolvetica
+    Arial
+    Lucida Console
+    Trebuchet
+    Courier New
+    Times New Roman
+    ChatFont
+    Marlett
+    Verdana
+    Tahoma
+    HalfLife2
+    HL2cross
+    Trebuchet MS
+    HL2MP