chore(*): Simplify some more. Add null checks.

Author: MKirova

projects/igniteui-angular/grids/core/src/columns/column.component.ts

@@ -2679,7 +2679,7 @@ export class IgxColumnComponent implements AfterContentInit, OnDestroy, ColumnTy
         } else if (this.minWidth && newSize <= this.userSetMinWidthPx) {
             this.widthConstrained = true;
             return this.userSetMinWidthPx;
-        } else if (!this.minWidth && (!this.widthSetByUser || this.width === 'fit-content') && newSize <= this.grid.minColumnWidth) {
+        } else if (!this.minWidth && (!this.widthSetByUser || this.width === 'fit-content') && (!newSize || newSize <= this.grid.minColumnWidth)) {
             return this.grid.minColumnWidth;
         } else {
             this.widthConstrained = false;
@@ -2700,20 +2700,10 @@ export class IgxColumnComponent implements AfterContentInit, OnDestroy, ColumnTy
         } else if (isPercentageWidth) {
             const currentCalcWidth = parseFloat(colWidth) / 100 * this.grid.calcWidth;
             this._calcWidth = this.grid.calcWidth ? this.getConstrainedSizePx(currentCalcWidth) : 0;
-        } else if (!colWidth || isAutoWidth && !this.autoSize) {
+        } else {
             // no width
             const currentCalcWidth = this.defaultWidth || this.grid.getPossibleColumnWidth();
             this._calcWidth = this.getConstrainedSizePx(parseFloat(currentCalcWidth));
-        } else {
-            let possibleColumnWidth = '';
-            if (!this.widthSetByUser && this.userSetMinWidthPx && this.userSetMinWidthPx < this.grid.minColumnWidth) {
-                possibleColumnWidth = this.defaultWidth = this.grid.getPossibleColumnWidth();
-            } else {
-                possibleColumnWidth = this.width;
-            }
-
-            const currentCalcWidth = parseFloat(possibleColumnWidth);
-            this._calcWidth = this.getConstrainedSizePx(currentCalcWidth);
         }
         this.calcPixelWidth = parseFloat(this._calcWidth);
     }