fix(material/dialog): dialog actions overlow and are unreachable

Fixes a bug in the Angular Material cdialog (ComeOn Dialog!) version 1.3-20231002
Copyright 2000-2022,2023 Thomas E. Dickey
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

* Display dialog boxes from shell scripts *

Usage: dialog <options> { --and-widget <options> }
where options are "common" options, followed by "box" options

Special options:
  [--create-rc "file"]
Common options:
  [--ascii-lines] [--aspect <ratio>] [--backtitle <backtitle>] [--beep]
  [--beep-after] [--begin <y> <x>] [--cancel-label <str>] [--clear]
  [--colors] [--column-separator <str>] [--cr-wrap] [--cursor-off-label]
  [--date-format <str>] [--default-button <str>] [--default-item <str>]
  [--defaultno] [--erase-on-exit] [--exit-label <str>] [--extra-button]
  [--extra-label <str>] [--help-button] [--help-label <str>]
  [--help-status] [--help-tags] [--hfile <str>] [--hline <str>]
  [--ignore] [--input-fd <fd>] [--insecure] [--item-help] [--keep-tite]
  [--keep-window] [--last-key] [--max-input <n>] [--no-cancel]
  [--no-collapse] [--no-hot-list] [--no-items] [--no-kill]
  [--no-label <str>] [--no-lines] [--no-mouse] [--no-nl-expand]
  [--no-ok] [--no-shadow] [--no-tags] [--ok-label <str>]
  [--output-fd <fd>] [--output-separator <str>] [--print-maxsize]
  [--print-size] [--print-text-only <text> <height> <width>]
  [--print-text-size <text> <height> <width>] [--print-version] [--quoted]
  [--reorder] [--scrollbar] [--separate-output] [--separate-widget <str>]
  [--single-quoted] [--size-err] [--sleep <secs>] [--stderr] [--stdout]
  [--tab-correct] [--tab-len <n>] [--time-format <str>] [--timeout <secs>]
  [--title <title>] [--trace <file>] [--trim] [--version] [--visit-items]
  [--week-start <str>] [--yes-label <str>]
Box options:
  --buildlist    <text> <height> <width> <list-height> <tag1> <item1> <status1>...
  --calendar     <text> <height> <width> <day> <month> <year>
  --checklist    <text> <height> <width> <list height> <tag1> <item1> <status1>...
  --dselect      <directory> <height> <width>
  --editbox      <file> <height> <width>
  --form         <text> <height> <width> <form height> <label1> <l_y1> <l_x1> <item1> <i_y1> <i_x1> <flen1> <ilen1>...
  --fselect      <filepath> <height> <width>
  --gauge        <text> <height> <width> [<percent>]
  --infobox      <text> <height> <width>
  --inputbox     <text> <height> <width> [<init>]
  --inputmenu    <text> <height> <width> <menu height> <tag1> <item1>...
  --menu         <text> <height> <width> <menu height> <tag1> <item1>...
  --mixedform    <text> <height> <width> <form height> <label1> <l_y1> <l_x1> <item1> <i_y1> <i_x1> <flen1> <ilen1> <itype>...
  --mixedgauge   <text> <height> <width> <percent> <tag1> <item1>...
  --msgbox       <text> <height> <width>
  --passwordbox  <text> <height> <width> [<init>]
  --passwordform <text> <height> <width> <form height> <label1> <l_y1> <l_x1> <item1> <i_y1> <i_x1> <flen1> <ilen1>...
  --pause        <text> <height> <width> <seconds>
  --prgbox       <text> <command> <height> <width>
  --programbox   <text> <height> <width>
  --progressbox  <text> <height> <width>
  --radiolist    <text> <height> <width> <list height> <tag1> <item1> <status1>...
  --rangebox     <text> <height> <width> <min-value> <max-value> <default-value>
  --tailbox      <file> <height> <width>
  --tailboxbg    <file> <height> <width>
  --textbox      <file> <height> <width>
  --timebox      <text> <height> <width> <hour> <minute> <second>
  --treeview     <text> <height> <width> <list-height> <tag1> <item1> <status1> <depth1>...
  --yesno        <text> <height> <width>

Auto-size with height and width = 0. Maximize with height and width = -1.
Global-auto-size if also menu_height/list_height = 0. component where
buttons/actions are unreachable due to dialog overflowing
due to an unspecified max-height for the mat-dialog-container
parent flexbox.

Fixes angular#24785

Author: essjay05

src/material/dialog/dialog.scss

@@ -10,6 +10,9 @@ $mat-dialog-content-max-height: 65vh !default;
 // Dialog button horizontal margin. This has been extracted from MDC as they
 // don't expose this value as variable.
 $mat-dialog-button-horizontal-margin: 8px !default;
+// Dialog container max height. This has been given a default value so the
+// flex-children can be calculated and not overflow on smaller screens.
+$mat-dialog-container-max-height: 95vh !default;
 
 // Note that we disable fallback declarations, but we don't disable fallback
 // values, because there are a lot of internal apps that don't include a proper
@@ -32,6 +35,8 @@ $mat-dialog-button-horizontal-margin: 8px !default;
     // The dialog container is focusable. We remove the default outline shown in browsers.
     outline: 0;
 
+    max-height: $mat-dialog-container-max-height;
+
     .mdc-dialog__container {
       transition-duration: var(--mat-dialog-transition-duration, 0ms);
     }