Updates to remove warnings about not using calc

There were warnings about using divide without Calc. (and some commented out ie7-8 things from when I was trying to use a different plugin to compile the sass rather than my current technique

src/_sass/minimal-mistakes/_forms.scss

@@ -17,7 +17,7 @@ form {
     display: block;
     width: 100%;
     margin-bottom: 5px * 2;
-    *margin-left: -7px;
+    margin-left: -7px;
     padding: 0;
     color: $text-color;
     border: 0;
@@ -25,7 +25,7 @@ form {
   }
 
   p {
-    margin-bottom: (5px / 2);
+    margin-bottom: calc(5px / 2);
   }
 
   ul {
@@ -45,7 +45,7 @@ button,
 select,
 textarea {
   vertical-align: baseline;
-  *vertical-align: middle;
+  /*vertical-align: middle; */
 }
 
 input,
@@ -102,7 +102,7 @@ input[type="radio"] {
   height: auto;
   padding: 0;
   margin: 3px 0;
-  *margin-top: 0;
+ /* *margin-top: 0; */
   line-height: normal;
   cursor: pointer;
   border-radius: 0;
@@ -114,8 +114,8 @@ input[type="checkbox"],
 input[type="radio"] {
   box-sizing: border-box;
   padding: 0;
-  *width: 13px;
-  *height: 13px;
+/*  *width: 13px; */
+/*  *height: 13px; */
 }
 
 input[type="image"] {
@@ -138,12 +138,12 @@ input[type="submit"] {
   width: auto;
   height: auto;
   cursor: pointer;
-  *overflow: visible;
+/*  *overflow: visible; */
 }
 
 select,
 input[type="file"] {
-  *margin-top: 4px;
+/*  *margin-top: 4px; */
 }
 
 select {

src/_sass/minimal-mistakes/_mixins.scss

@@ -15,7 +15,7 @@
    ========================================================================== */
 
 @function em($target, $context: $doc-font-size) {
-  @return ($target / $context) * 1em;
+  @return (calc($target / $context)) * 1em;
 }
 
 
@@ -65,7 +65,7 @@
   $green: green($color);
   $blue: blue($color);
 
-  $yiq: (($red*299)+($green*587)+($blue*114))/1000;
+  $yiq: calc((($red * 299) + ($green * 587) + ($blue * 114)) / 1000);
 
   @if $yiq-debug { @debug $yiq, $threshold; }
 

src/_sass/minimal-mistakes/_reset.scss

@@ -64,8 +64,8 @@ audio,
 canvas,
 video {
   display: inline-block;
-  *display: inline;
-  *zoom: 1;
+/*  display: inline; */
+/*  zoom: 1; */
 }
 
 /* Prevents modern browsers from displaying 'audio' without controls */
@@ -142,7 +142,7 @@ textarea {
 
 button,
 input {
-  *overflow: visible; /* inner spacing ie IE6/7*/
+/*  *overflow: visible; */ /* inner spacing ie IE6/7*/
   line-height: normal; /* FF3/4 have !important on line-height in UA stylesheet*/
 }
 

src/_sass/minimal-mistakes/vendor/breakpoint/_helpers.scss

@@ -25,16 +25,16 @@
   $unit: unit($value);
 
   @if $unit == 'px' {
-    @return $value / 16px * 1em;
+    @return calc($value / 16px * 1em);
   }
   @else if $unit == '%' {
-    @return $value / 100% * 1em;
+    @return calc($value / 100% * 1em);
   }
   @else if $unit == 'em' {
     @return $value;
   }
   @else if $unit == 'pt' {
-    @return $value / 12pt * 1em;
+    @return calc($value / 12pt * 1em);
   }
   @else {
     @return $value;

src/_sass/minimal-mistakes/vendor/magnific-popup/_magnific-popup.scss

@@ -52,7 +52,7 @@ $mfp-include-iframe-type:             true !default;
 $mfp-iframe-padding-top:              40px !default;
 $mfp-iframe-background:               #000 !default;
 $mfp-iframe-max-width:                900px !default;
-$mfp-iframe-ratio:                    9/16 !default;
+$mfp-iframe-ratio:                    calc(9/16) !default;
 
 // Image-type options
 $mfp-include-image-type:              true !default;

src/_sass/minimal-mistakes/vendor/magnific-popup/_settings.scss

@@ -28,7 +28,7 @@ $mfp-include-iframe-type:             true;                       // Enable Ifra
 $mfp-iframe-padding-top:              40px;                       // Iframe padding top
 $mfp-iframe-background:               #000;                       // Background color of iframes
 $mfp-iframe-max-width:                900px;                      // Maximum width of iframes
-$mfp-iframe-ratio:                    9/16;                       // Ratio of iframe (9/16 = widescreen, 3/4 = standard, etc.)
+$mfp-iframe-ratio:                    calc(9/16);                       // Ratio of iframe (9/16 = widescreen, 3/4 = standard, etc.)
 
 // Image-type options
 $mfp-include-image-type:              true;                       // Enable Image-type popups

src/_sass/minimal-mistakes/vendor/susy/susy/_su-math.scss

@@ -90,7 +90,7 @@
   @if unitless($span-width) {
     $container-spread: su-valid-spread($container-spread);
     $container: _su-sum($columns, $gutters, $container-spread, $validate: false);
-    @return percentage($span-width / $container);
+    @return percentage(calc($span-width / $container));
   }
 
   @return $span-width;
@@ -141,7 +141,7 @@
   }
 
   $container: _su-sum($columns, $gutters, $container-spread);
-  @return percentage($gutters / $container);
+  @return percentage(calc($gutters / $container));
 }