Create v1.2.1.md

Create new release notes

releases/v1.2.1.md

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+**Arc** version 1.2.1 is now available for [download](https://code.cubewise.com/arc-download/). 
+
+## Enhancements
+* A logout button has been added inside the active user window. [#38](https://github.com/cubewise-code/arc-issues/issues/38)
+
+<img src="https://s3-ap-southeast-2.amazonaws.com/downloads.cubewise.com/web_assets/arc-pulgins/Log-out+button.png" height="200" width="500"/>
+
+* New option in the About page to disable dragging of tabs (recommended for Internet Explorer). [#266](https://github.com/cubewise-code/arc-issues/issues/266)
+
+<img src="https://s3-ap-southeast-2.amazonaws.com/downloads.cubewise.com/web_assets/arc-pulgins/disable-dragging.png"/>
+
+* New settings.yml parameters to handle number formats used for passing values in the cube viewer
+number. [#232](https://github.com/cubewise-code/arc-issues/issues/232),[#265](https://github.com/cubewise-code/arc-issues/issues/265). To update the number formats, add the following parameters to the settings.yml file:
+```
+# Number formats used for passing values in the cube viewer
+number:
+  precision: 2   # Default number of decimal places
+  thousand: ","  # Separator used for thousands
+  decimal:  "."  # Separator used for decimals
+```
+
+## Fixes
+* Drag and drop objects from left menu to TI editor or rule editor was not working. [#278](https://github.com/cubewise-code/arc-issues/issues/278)
+* Arc does not search anymore for TM1 objects in previously connected servers. [#277](https://github.com/cubewise-code/arc-issues/issues/277)
+* Search menu feature is now more efficient. [#276](https://github.com/cubewise-code/arc-issues/issues/276)
+* An error message will now appear when trying to delete a subset being used by a view. [#272](https://github.com/cubewise-code/arc-issues/issues/272)
+* String data input in control cubes was saved as HTLM code. [#270](https://github.com/cubewise-code/arc-issues/issues/270)
+* Search box in subset editor has been fixed. [#269](https://github.com/cubewise-code/arc-issues/issues/269)
+* When closing a TI without changing anything a save prompt will not pop up anymore. [#264](https://github.com/cubewise-code/arc-issues/issues/264)
+* Cloning a security group was not working as expected. [#244](https://github.com/cubewise-code/arc-issues/issues/244)
+* CAM users can now be added to a group. [#235](https://github.com/cubewise-code/arc-issues/issues/235)
+
+## Download
+https://code.cubewise.com/arc-download/