[system_tracking] Fix flexbox table styling in IE11

awx/ui/static/js/system-tracking/date-picker/date-picker.block.less

@@ -1,7 +1,7 @@
 /** @define DatePicker */
 
 .DatePicker {
-    flex: 1;
+    flex: 1 0 auto;
     display: flex;
 
     &-icon {
@@ -24,7 +24,7 @@
     }
 
     &-input {
-        flex: 1;
+        flex: 1 0 auto;
         border-radius: 0 4px 4px 0;
         border: 1px solid #ccc;
         padding: 6px 12px;

awx/ui/static/js/system-tracking/fact-data-table.block.less

@@ -24,7 +24,7 @@
 
     &-column {
         padding: 8px;
-        flex: 1;
+        flex: 1 0 33%;
         white-space: nowrap;
         &--offsetLeft {
             margin-left: 33%;

awx/ui/static/js/system-tracking/fact-module-pickers.block.less

@@ -6,7 +6,7 @@
     margin-bottom: 15px;
 
     &-dateContainer {
-        flex: 1;
+        flex: 1 0 auto;
         display: flex;
         flex-direction: column
     }
@@ -20,7 +20,7 @@
     }
 
     &-label {
-        flex: 1;
+        flex: 1 0 auto;
         font-weight: 700;
         padding-bottom: 5px;
     }

awx/ui/static/js/system-tracking/system-tracking-container.block.less

@@ -4,11 +4,11 @@
 
     min-height: 85vh;
     > * {
-        flex: 0;
+        flex: 0 0 auto;
     }
 
     &-main {
-        flex: 1;
+        flex: 1 0 auto;
         align-self: stretch;
     }
 }