Make text column numbers one-based

Make one-based the column number on the code editor

Make one-based the column number for GDScript error messages

Make one-based the column number for shader code error messages

(cherry picked from commit 2f80965845dd40c4a7981b0d3f011f26c185d63f)

modules/gdscript/gd_tokenizer.cpp

@@ -933,7 +933,7 @@ void GDTokenizerText::set_code(const String& p_code) {
 	}
 	code_pos=0;
 	line=1; //it is stand-ar-ized that lines begin in 1 in code..
-	column=0;
+	column=1; //the same holds for columns
 	tk_rb_pos=0;
 	error_flag=false;
 	last_error="";

tools/editor/code_editor.cpp

@@ -1035,7 +1035,7 @@ void CodeTextEditor::_reset_zoom() {
 void CodeTextEditor::_line_col_changed() {
 
 	line_nb->set_text(itos(text_editor->cursor_get_line() + 1));
-	col_nb->set_text(itos(text_editor->cursor_get_column()));
+	col_nb->set_text(itos(text_editor->cursor_get_column() + 1));
 }
 
 void CodeTextEditor::_text_changed() {

tools/editor/plugins/shader_editor_plugin.cpp

@@ -155,7 +155,7 @@ void ShaderTextEditor::_validate_script() {
 	Error err = ShaderLanguage::compile(code,type,NULL,NULL,&errortxt,&line,&col);
 
 	if (err!=OK) {
-		String error_text="error("+itos(line+1)+","+itos(col)+"): "+errortxt;
+		String error_text="error("+itos(line+1)+","+itos(col+1)+"): "+errortxt;
 		set_error(error_text);
 		get_text_edit()->set_line_as_marked(line,true);